Version picker deployed for v1.80 docs to Github Pages

author: Action Bot <action@synapse.bot.com> 2023-12-11 14:54:37 +0000
committer: Action Bot <action@synapse.bot.com> 2023-12-11 14:54:37 +0000
commit: 3a344f65887d5277b80984944b6cac048da22efb (patch)
tree: 6301dc15783b4cb844e1fc938d5e7606b3d2159f
parent: Version picker deployed for v1.81 docs to Github Pages (diff)
download: synapse-3a344f65887d5277b80984944b6cac048da22efb.tar.xz
107 files changed, 1993 insertions, 112 deletions
diff --git a/v1.80/.nojekyll b/v1.80/.nojekyll
deleted file mode 100644
index f17311098f..0000000000
--- a/v1.80/.nojekyll
+++ /dev/null
@@ -1 +0,0 @@
-This file makes sure that Github Pages doesn't process mdBook's output.
diff --git a/v1.80/.sample_config_header.yaml b/v1.80/.sample_config_header.yaml
deleted file mode 100644
index 2355337e6d..0000000000
--- a/v1.80/.sample_config_header.yaml
+++ /dev/null
@@ -1,12 +0,0 @@
-# This file is maintained as an up-to-date snapshot of the default
-# homeserver.yaml configuration generated by Synapse. You can find a
-# complete accounting of possible configuration options at
-# https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html
-#
-# It is *not* intended to be copied and used as the basis for a real
-# homeserver.yaml. Instead, if you are starting from scratch, please generate
-# a fresh config using Synapse by following the instructions in
-# https://matrix-org.github.io/synapse/latest/setup/installation.html.
-#
-################################################################################
-
diff --git a/v1.80/404.html b/v1.80/404.html
index e300ccf7e3..078e54538c 100644
--- a/v1.80/404.html
+++ b/v1.80/404.html
@@ -29,6 +29,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -104,6 +105,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -173,5 +186,7 @@
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/CAPTCHA_SETUP.html b/v1.80/CAPTCHA_SETUP.html
index a047d318e3..6ab9350065 100644
--- a/v1.80/CAPTCHA_SETUP.html
+++ b/v1.80/CAPTCHA_SETUP.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -220,5 +233,7 @@ listeners section of the <code>homeserver.yaml</code> configuration file.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/admin_api/account_validity.html b/v1.80/admin_api/account_validity.html
index 660867c5f2..9fe2d4d7ab 100644
--- a/v1.80/admin_api/account_validity.html
+++ b/v1.80/admin_api/account_validity.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -214,5 +227,7 @@ milliseconds since epoch:</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/admin_api/event_reports.html b/v1.80/admin_api/event_reports.html
index 8357ecd2c8..5f75e1fc3a 100644
--- a/v1.80/admin_api/event_reports.html
+++ b/v1.80/admin_api/event_reports.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -348,5 +361,7 @@ will be an empty JSON object.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/admin_api/media_admin_api.html b/v1.80/admin_api/media_admin_api.html
index baa64e9f25..c2b3b71db8 100644
--- a/v1.80/admin_api/media_admin_api.html
+++ b/v1.80/admin_api/media_admin_api.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -403,5 +416,7 @@ from the originating server.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/admin_api/purge_history_api.html b/v1.80/admin_api/purge_history_api.html
index e36a9dde07..edd67756b8 100644
--- a/v1.80/admin_api/purge_history_api.html
+++ b/v1.80/admin_api/purge_history_api.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -234,5 +247,7 @@ a purge id:</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/admin_api/register_api.html b/v1.80/admin_api/register_api.html
index 1661119c67..9923b2fc7a 100644
--- a/v1.80/admin_api/register_api.html
+++ b/v1.80/admin_api/register_api.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -259,5 +272,7 @@ def generate_mac(nonce, user, password, admin=False, user_type=None):
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/admin_api/room_membership.html b/v1.80/admin_api/room_membership.html
index 0dda9d468a..42036daf3d 100644
--- a/v1.80/admin_api/room_membership.html
+++ b/v1.80/admin_api/room_membership.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -211,5 +224,7 @@ for a server admin: see <a href="../usage/administration/admin_api/">Admin API</
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/admin_api/rooms.html b/v1.80/admin_api/rooms.html
index 395727f64d..4782d9184e 100644
--- a/v1.80/admin_api/rooms.html
+++ b/v1.80/admin_api/rooms.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -1138,5 +1151,7 @@ that were deleted.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/admin_api/server_notices.html b/v1.80/admin_api/server_notices.html
index 0809859a6d..f01122efa0 100644
--- a/v1.80/admin_api/server_notices.html
+++ b/v1.80/admin_api/server_notices.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -216,5 +229,7 @@ can be used. See <a href="../server_notices.html">the server notices documentati
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/admin_api/statistics.html b/v1.80/admin_api/statistics.html
index e6dd559ff3..a971c5340d 100644
--- a/v1.80/admin_api/statistics.html
+++ b/v1.80/admin_api/statistics.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -261,5 +274,7 @@ about the user and their local media. Objects contain the following fields:
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/admin_api/user_admin_api.html b/v1.80/admin_api/user_admin_api.html
index 03dddef241..922a97a9eb 100644
--- a/v1.80/admin_api/user_admin_api.html
+++ b/v1.80/admin_api/user_admin_api.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -1229,5 +1242,7 @@ for more information.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/admin_api/version_api.html b/v1.80/admin_api/version_api.html
index c1cd34a48d..7c330b8802 100644
--- a/v1.80/admin_api/version_api.html
+++ b/v1.80/admin_api/version_api.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -199,5 +212,7 @@ contains Synapse version information).</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/application_services.html b/v1.80/application_services.html
index 0675d1f1e7..d3d3a48ce9 100644
--- a/v1.80/application_services.html
+++ b/v1.80/application_services.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -212,5 +225,7 @@ namespaces:
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/auth_chain_difference_algorithm.html b/v1.80/auth_chain_difference_algorithm.html
index d921ee4ebc..d864429d6c 100644
--- a/v1.80/auth_chain_difference_algorithm.html
+++ b/v1.80/auth_chain_difference_algorithm.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -306,5 +319,7 @@ level).</li>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/code_style.html b/v1.80/code_style.html
index 937be65168..5c59f85ce1 100644
--- a/v1.80/code_style.html
+++ b/v1.80/code_style.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -304,5 +317,7 @@ is left as an exercise for the reader!</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/consent_tracking.html b/v1.80/consent_tracking.html
index b2c9f8b45f..e9965df2cc 100644
--- a/v1.80/consent_tracking.html
+++ b/v1.80/consent_tracking.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -346,5 +359,7 @@ URI that clients use to connect to the server. (It is used to construct
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/delegate.html b/v1.80/delegate.html
index 02ba4f587b..67118c1184 100644
--- a/v1.80/delegate.html
+++ b/v1.80/delegate.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -265,5 +278,7 @@ reverse proxy.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/deprecation_policy.html b/v1.80/deprecation_policy.html
index 79119eae07..de44382d3e 100644
--- a/v1.80/deprecation_policy.html
+++ b/v1.80/deprecation_policy.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -223,5 +236,7 @@ and is consistent with the <code>.deb</code> packages released by Matrix.org.</p
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/development/cas.html b/v1.80/development/cas.html
index 5d74ccf710..0cfd1a3dff 100644
--- a/v1.80/development/cas.html
+++ b/v1.80/development/cas.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -247,5 +260,7 @@ and that the CAS server is on port 8000, both on localhost.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/development/contributing_guide.html b/v1.80/development/contributing_guide.html
index 038bb27c49..ea10dfcffc 100644
--- a/v1.80/development/contributing_guide.html
+++ b/v1.80/development/contributing_guide.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -619,5 +632,7 @@ do!</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/development/database_schema.html b/v1.80/development/database_schema.html
index 22ffe3bf76..3cda5391ed 100644
--- a/v1.80/development/database_schema.html
+++ b/v1.80/development/database_schema.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -363,5 +376,7 @@ will never happen (SHA256 has a massive big key space).</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/development/demo.html b/v1.80/development/demo.html
index fa8ed6e29e..a5c145e7b2 100644
--- a/v1.80/development/demo.html
+++ b/v1.80/development/demo.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -220,5 +233,7 @@ name.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/development/dependencies.html b/v1.80/development/dependencies.html
index 0064454883..d31523d328 100644
--- a/v1.80/development/dependencies.html
+++ b/v1.80/development/dependencies.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -401,5 +414,7 @@ letting Poetry do the right thing.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/development/experimental_features.html b/v1.80/development/experimental_features.html
index b9527375f6..0daea52711 100644
--- a/v1.80/development/experimental_features.html
+++ b/v1.80/development/experimental_features.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -218,5 +231,7 @@ configuration key (see the <code>synapse.config.experimental</code> file) and ei
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/development/git.html b/v1.80/development/git.html
index 6337ef8586..7490e497e7 100644
--- a/v1.80/development/git.html
+++ b/v1.80/development/git.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -306,5 +319,7 @@ the history of Synapse), we've had two releases in flight at once. Obviously,
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/development/internal_documentation/index.html b/v1.80/development/internal_documentation/index.html
index 2132e89463..03e4a91db4 100644
--- a/v1.80/development/internal_documentation/index.html
+++ b/v1.80/development/internal_documentation/index.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -194,5 +207,7 @@ under the Usage section of the documentation.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/development/releases.html b/v1.80/development/releases.html
index e0f70ca08e..66e4f97521 100644
--- a/v1.80/development/releases.html
+++ b/v1.80/development/releases.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -215,5 +228,7 @@ found in the <a href="https://matrix.org/blog/category/security">security catego
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/development/reviews.html b/v1.80/development/reviews.html
index d37917af74..a982288c11 100644
--- a/v1.80/development/reviews.html
+++ b/v1.80/development/reviews.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -218,5 +231,7 @@ with the rationale on why you're putting it back in the queue.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/development/room-dag-concepts.html b/v1.80/development/room-dag-concepts.html
index 1f8fa07674..d75401dc91 100644
--- a/v1.80/development/room-dag-concepts.html
+++ b/v1.80/development/room-dag-concepts.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -274,5 +287,7 @@ notes from @Azrenbeth, https://pastebin.com/seUGVGeT</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/development/saml.html b/v1.80/development/saml.html
index ce3b6551ec..c9da2a84a9 100644
--- a/v1.80/development/saml.html
+++ b/v1.80/development/saml.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -223,5 +236,7 @@ samling page and clear the site data. In Chrome, this will be a button on the Ap
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/development/synapse_architecture/cancellation.html b/v1.80/development/synapse_architecture/cancellation.html
index 953cb23905..0daa1a5c9f 100644
--- a/v1.80/development/synapse_architecture/cancellation.html
+++ b/v1.80/development/synapse_architecture/cancellation.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -532,5 +545,7 @@ with LoggingContext(&quot;request-1&quot;):
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/development/synapse_architecture/faster_joins.html b/v1.80/development/synapse_architecture/faster_joins.html
index 76b88fcd98..b20eed0082 100644
--- a/v1.80/development/synapse_architecture/faster_joins.html
+++ b/v1.80/development/synapse_architecture/faster_joins.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -526,5 +539,7 @@ work?</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/docs/website_files/version-picker.css b/v1.80/docs/website_files/version-picker.css
new file mode 100644
index 0000000000..28e5d5219a
--- /dev/null
+++ b/v1.80/docs/website_files/version-picker.css
@@ -0,0 +1,78 @@
+.version-picker {
+    display: flex;
+    align-items: center;
+}
+
+.version-picker .dropdown {
+    width: 130px;
+    max-height: 29px;
+    margin-left: 10px;
+    display: inline-block;
+    border-radius: 4px;
+    border: 1px solid var(--theme-popup-border);
+    position: relative;
+    font-size: 13px;
+    color: var(--fg);
+    height: 100%;
+    text-align: left;
+}
+.version-picker .dropdown .select {
+    cursor: pointer;
+    display: block;
+    padding: 5px 2px 5px 15px;
+}
+.version-picker .dropdown .select > i {
+    font-size: 10px;
+    color: var(--fg);
+    cursor: pointer;
+    float: right;
+    line-height: 20px !important;
+}
+.version-picker .dropdown:hover {
+    border: 1px solid var(--theme-popup-border);
+}
+.version-picker .dropdown:active {
+    background-color: var(--theme-popup-bg);
+}
+.version-picker .dropdown.active:hover,
+.version-picker .dropdown.active {
+    border: 1px solid var(--theme-popup-border);
+    border-radius: 2px 2px 0 0;
+    background-color: var(--theme-popup-bg);
+}
+.version-picker .dropdown.active .select > i {
+    transform: rotate(-180deg);
+}
+.version-picker .dropdown .dropdown-menu {
+    position: absolute;
+    background-color: var(--theme-popup-bg);
+    width: 100%;
+    left: -1px;
+    right: 1px;
+    margin-top: 1px;
+    border: 1px solid var(--theme-popup-border);
+    border-radius: 0 0 4px 4px;
+    overflow: hidden;
+    display: none;
+    max-height: 300px;
+    overflow-y: auto;
+    z-index: 9;
+}
+.version-picker .dropdown .dropdown-menu li {
+    font-size: 12px;
+    padding: 6px 20px;
+    cursor: pointer;
+} 
+.version-picker .dropdown .dropdown-menu {
+    padding: 0;
+    list-style: none;
+}
+.version-picker .dropdown .dropdown-menu li:hover {
+    background-color: var(--theme-hover);
+}
+.version-picker .dropdown .dropdown-menu li.active::before {
+    display: inline-block;
+    content: "✓";
+    margin-inline-start: -14px;
+    width: 14px;
+}
\ No newline at end of file
diff --git a/v1.80/docs/website_files/version-picker.js b/v1.80/docs/website_files/version-picker.js
new file mode 100644
index 0000000000..bb35a7d896
--- /dev/null
+++ b/v1.80/docs/website_files/version-picker.js
@@ -0,0 +1,127 @@
+
+const dropdown = document.querySelector('.version-picker .dropdown');
+const dropdownMenu = dropdown.querySelector('.dropdown-menu');
+
+fetchVersions(dropdown, dropdownMenu).then(() => {
+    initializeVersionDropdown(dropdown, dropdownMenu);
+});
+
+/**
+ * Initialize the dropdown functionality for version selection.
+ * 
+ * @param {Element} dropdown - The dropdown element.
+ * @param {Element} dropdownMenu - The dropdown menu element.
+ */
+function initializeVersionDropdown(dropdown, dropdownMenu) {
+    // Toggle the dropdown menu on click
+    dropdown.addEventListener('click', function () {
+        this.setAttribute('tabindex', 1);
+        this.classList.toggle('active');
+        dropdownMenu.style.display = (dropdownMenu.style.display === 'block') ? 'none' : 'block';
+    });
+  
+    // Remove the 'active' class and hide the dropdown menu on focusout
+    dropdown.addEventListener('focusout', function () {
+        this.classList.remove('active');
+        dropdownMenu.style.display = 'none';
+    });
+  
+    // Handle item selection within the dropdown menu
+    const dropdownMenuItems = dropdownMenu.querySelectorAll('li');    
+    dropdownMenuItems.forEach(function (item) {
+        item.addEventListener('click', function () {
+            dropdownMenuItems.forEach(function (item) {
+                item.classList.remove('active');
+            });
+            this.classList.add('active');
+            dropdown.querySelector('span').textContent = this.textContent;
+            dropdown.querySelector('input').value = this.getAttribute('id');
+
+            window.location.href = changeVersion(window.location.href, this.textContent);
+        });
+    });
+};
+
+/**
+ * This function fetches the available versions from a GitHub repository
+ * and inserts them into the version picker.
+ * 
+ * @param {Element} dropdown - The dropdown element.
+ * @param {Element} dropdownMenu - The dropdown menu element.
+ * @returns {Promise<Array<string>>} A promise that resolves with an array of available versions.
+ */
+function fetchVersions(dropdown, dropdownMenu) {
+    return new Promise((resolve, reject) => {
+        window.addEventListener("load", () => {
+
+            fetch("https://api.github.com/repos/matrix-org/synapse/git/trees/gh-pages", {
+                cache: "force-cache",
+            }).then(res => 
+                res.json()
+            ).then(resObject => {
+                const excluded = ['dev-docs', 'v1.91.0', 'v1.80.0', 'v1.69.0'];
+                const tree = resObject.tree.filter(item => item.type === "tree" && !excluded.includes(item.path));
+                const versions = tree.map(item => item.path).sort(sortVersions);
+
+                // Create a list of <li> items for versions
+                versions.forEach((version) => {
+                    const li = document.createElement("li");
+                    li.textContent = version;
+                    li.id = version;
+    
+                    if (window.SYNAPSE_VERSION === version) {
+                        li.classList.add('active');
+                        dropdown.querySelector('span').textContent = version;
+                        dropdown.querySelector('input').value = version;
+                    }
+    
+                    dropdownMenu.appendChild(li);
+                });
+
+                resolve(versions);
+
+            }).catch(ex => {
+                console.error("Failed to fetch version data", ex);
+                reject(ex);
+            })
+        });
+    });
+}
+
+/**
+ * Custom sorting function to sort an array of version strings.
+ *
+ * @param {string} a - The first version string to compare.
+ * @param {string} b - The second version string to compare.
+ * @returns {number} - A negative number if a should come before b, a positive number if b should come before a, or 0 if they are equal.
+ */
+function sortVersions(a, b) {
+    // Put 'develop' and 'latest' at the top
+    if (a === 'develop' || a === 'latest') return -1;
+    if (b === 'develop' || b === 'latest') return 1;
+
+    const versionA = (a.match(/v\d+(\.\d+)+/) || [])[0];
+    const versionB = (b.match(/v\d+(\.\d+)+/) || [])[0];
+
+    return versionB.localeCompare(versionA);
+}
+
+/**
+ * Change the version in a URL path.
+ *
+ * @param {string} url - The original URL to be modified.
+ * @param {string} newVersion - The new version to replace the existing version in the URL.
+ * @returns {string} The updated URL with the new version.
+ */
+function changeVersion(url, newVersion) {
+    const parsedURL = new URL(url);
+    const pathSegments = parsedURL.pathname.split('/');
+  
+    // Modify the version
+    pathSegments[2] = newVersion;
+
+    // Reconstruct the URL
+    parsedURL.pathname = pathSegments.join('/');
+  
+    return parsedURL.href;
+}
\ No newline at end of file
diff --git a/v1.80/docs/website_files/version.js b/v1.80/docs/website_files/version.js
new file mode 100644
index 0000000000..41de2c86a7
--- /dev/null
+++ b/v1.80/docs/website_files/version.js
@@ -0,0 +1 @@
+window.SYNAPSE_VERSION = 'v1.80';
diff --git a/v1.80/federate.html b/v1.80/federate.html
index f52beb11b4..ed86d5fb43 100644
--- a/v1.80/federate.html
+++ b/v1.80/federate.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -238,5 +251,7 @@ useful just for development purposes. See
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/index.html b/v1.80/index.html
index d853008a2f..dca5bc0e4c 100644
--- a/v1.80/index.html
+++ b/v1.80/index.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -264,5 +277,7 @@ Policy</a>. Thank you!</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/jwt.html b/v1.80/jwt.html
index 600637f896..61154b18fc 100644
--- a/v1.80/jwt.html
+++ b/v1.80/jwt.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -281,5 +294,7 @@ print(result.decode(&quot;ascii&quot;))
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/log_contexts.html b/v1.80/log_contexts.html
index 31e001e8af..76c0834026 100644
--- a/v1.80/log_contexts.html
+++ b/v1.80/log_contexts.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -481,5 +494,7 @@ lead to leaked logcontexts which are incredibly hard to track down.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/manhole.html b/v1.80/manhole.html
index 2996c94239..a23b434265 100644
--- a/v1.80/manhole.html
+++ b/v1.80/manhole.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -254,5 +267,7 @@ parts of the process.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/media_repository.html b/v1.80/media_repository.html
index 71b85fbab5..2a5be243a0 100644
--- a/v1.80/media_repository.html
+++ b/v1.80/media_repository.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -245,5 +258,7 @@ url_cache_thumbnails/yyyy-mm-dd/aaaaaaaaaaaaaaaa/128-96-image-jpeg-scale
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/message_retention_policies.html b/v1.80/message_retention_policies.html
index 7f4f1f71f4..0cf9229845 100644
--- a/v1.80/message_retention_policies.html
+++ b/v1.80/message_retention_policies.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -342,5 +355,7 @@ operating system, the server admin needs to run <code>VACUUM FULL;</code> (or
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/metrics-howto.html b/v1.80/metrics-howto.html
index 8243108763..196e5d110b 100644
--- a/v1.80/metrics-howto.html
+++ b/v1.80/metrics-howto.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -458,5 +471,7 @@ renamed.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/modules/account_data_callbacks.html b/v1.80/modules/account_data_callbacks.html
index 6b353ddff3..3ff60ca7b3 100644
--- a/v1.80/modules/account_data_callbacks.html
+++ b/v1.80/modules/account_data_callbacks.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -276,5 +289,7 @@ class CustomAccountDataModule:
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/modules/account_validity_callbacks.html b/v1.80/modules/account_validity_callbacks.html
index f141765c70..677936bdb0 100644
--- a/v1.80/modules/account_validity_callbacks.html
+++ b/v1.80/modules/account_validity_callbacks.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -214,5 +227,7 @@ represented by their Matrix user ID.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/modules/background_update_controller_callbacks.html b/v1.80/modules/background_update_controller_callbacks.html
index 6fc7970302..4ecfb7c6d6 100644
--- a/v1.80/modules/background_update_controller_callbacks.html
+++ b/v1.80/modules/background_update_controller_callbacks.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -232,5 +245,7 @@ ensure that progress is always made.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/modules/index.html b/v1.80/modules/index.html
index 74fb801e04..52bf0b45e1 100644
--- a/v1.80/modules/index.html
+++ b/v1.80/modules/index.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -227,5 +240,7 @@ another part of Synapse's configuration file.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/modules/password_auth_provider_callbacks.html b/v1.80/modules/password_auth_provider_callbacks.html
index 4533026ac9..1176f98197 100644
--- a/v1.80/modules/password_auth_provider_callbacks.html
+++ b/v1.80/modules/password_auth_provider_callbacks.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -420,5 +433,7 @@ class MyAuthProvider:
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/modules/porting_legacy_module.html b/v1.80/modules/porting_legacy_module.html
index df9463345f..4a4b34f903 100644
--- a/v1.80/modules/porting_legacy_module.html
+++ b/v1.80/modules/porting_legacy_module.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -202,5 +215,7 @@ for more info).</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/modules/presence_router_callbacks.html b/v1.80/modules/presence_router_callbacks.html
index 51516af08c..bd1729e89a 100644
--- a/v1.80/modules/presence_router_callbacks.html
+++ b/v1.80/modules/presence_router_callbacks.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -267,5 +280,7 @@ class CustomPresenceRouter:
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/modules/spam_checker_callbacks.html b/v1.80/modules/spam_checker_callbacks.html
index 9c44bf6ca7..359138f77e 100644
--- a/v1.80/modules/spam_checker_callbacks.html
+++ b/v1.80/modules/spam_checker_callbacks.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -537,5 +550,7 @@ class ListSpamChecker:
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/modules/third_party_rules_callbacks.html b/v1.80/modules/third_party_rules_callbacks.html
index 43f97fa055..b44af5b83d 100644
--- a/v1.80/modules/third_party_rules_callbacks.html
+++ b/v1.80/modules/third_party_rules_callbacks.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -433,5 +446,7 @@ class EventCensorer:
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/modules/writing_a_module.html b/v1.80/modules/writing_a_module.html
index bc8627c62e..f69a5dcd6e 100644
--- a/v1.80/modules/writing_a_module.html
+++ b/v1.80/modules/writing_a_module.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -294,5 +307,7 @@ class MyModule:
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/openid.html b/v1.80/openid.html
index 39f6d0a33c..1a35ffd18a 100644
--- a/v1.80/openid.html
+++ b/v1.80/openid.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -813,5 +826,7 @@ are randomly generated data.</li>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/opentracing.html b/v1.80/opentracing.html
index db3b1b8ebe..33a2a5ac74 100644
--- a/v1.80/opentracing.html
+++ b/v1.80/opentracing.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -259,5 +272,7 @@ logged to OpenTracing's logs.</li>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/other/running_synapse_on_single_board_computers.html b/v1.80/other/running_synapse_on_single_board_computers.html
index 9c2111fd1a..916c519748 100644
--- a/v1.80/other/running_synapse_on_single_board_computers.html
+++ b/v1.80/other/running_synapse_on_single_board_computers.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -235,5 +248,7 @@ admin@homeserver:~$ sudo --user postgres psql matrix-synapse --command 'select c
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/password_auth_providers.html b/v1.80/password_auth_providers.html
index d8b9eecd31..c01ce41caf 100644
--- a/v1.80/password_auth_providers.html
+++ b/v1.80/password_auth_providers.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -299,5 +312,7 @@ wait for the <code>Awaitable</code> to complete, but the result is ignored.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/postgres.html b/v1.80/postgres.html
index af71da4100..1003e13120 100644
--- a/v1.80/postgres.html
+++ b/v1.80/postgres.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -394,5 +407,7 @@ successfully.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/print.html b/v1.80/print.html
index af62c44375..b1dd6ba6ad 100644
--- a/v1.80/print.html
+++ b/v1.80/print.html
@@ -29,6 +29,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -104,6 +105,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -18461,10 +18474,12 @@ admin@homeserver:~$ sudo --user postgres psql matrix-synapse --command 'select c
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
         <script type="text/javascript">
         window.addEventListener('load', function() {
             window.setTimeout(window.print, 100);
         });
         </script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/replication.html b/v1.80/replication.html
index c6686ca6fa..9c7596224b 100644
--- a/v1.80/replication.html
+++ b/v1.80/replication.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -217,5 +230,7 @@ the classes interact, can be found in
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/reverse_proxy.html b/v1.80/reverse_proxy.html
index aaf3bccfd8..40733653f0 100644
--- a/v1.80/reverse_proxy.html
+++ b/v1.80/reverse_proxy.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -407,5 +420,7 @@ we do not recommend exposing them to the public internet without good reason.</p
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/room_and_user_statistics.html b/v1.80/room_and_user_statistics.html
index 09f7a2cb63..e136730053 100644
--- a/v1.80/room_and_user_statistics.html
+++ b/v1.80/room_and_user_statistics.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -200,5 +213,7 @@ statistics for a room. Each subject can only have one entry.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/server_notices.html b/v1.80/server_notices.html
index 1296d5fa71..1a00a20736 100644
--- a/v1.80/server_notices.html
+++ b/v1.80/server_notices.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -229,5 +242,7 @@ displayname and avatar of the Server Notices user.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/setup/forward_proxy.html b/v1.80/setup/forward_proxy.html
index 557b80d084..fc395aeb7c 100644
--- a/v1.80/setup/forward_proxy.html
+++ b/v1.80/setup/forward_proxy.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -260,5 +273,7 @@ your <a href="../usage/configuration/homeserver_sample_config.html">homserver.ya
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/setup/installation.html b/v1.80/setup/installation.html
index 85a3d847a8..4f518f9f83 100644
--- a/v1.80/setup/installation.html
+++ b/v1.80/setup/installation.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -610,5 +623,7 @@ failing, e.g.:</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/setup/turn/coturn.html b/v1.80/setup/turn/coturn.html
index bb85cf2670..12fb18da83 100644
--- a/v1.80/setup/turn/coturn.html
+++ b/v1.80/setup/turn/coturn.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -347,5 +360,7 @@ IPv6 address that is mapped by NAT to the external IPv6 address.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/setup/turn/eturnal.html b/v1.80/setup/turn/eturnal.html
index 011889ea5d..607cc31b52 100644
--- a/v1.80/setup/turn/eturnal.html
+++ b/v1.80/setup/turn/eturnal.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -320,5 +333,7 @@ to query how many active sessions exist, to change logging behaviour and so on.<
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/sso_mapping_providers.html b/v1.80/sso_mapping_providers.html
index 355b389d5b..5fa1a54813 100644
--- a/v1.80/sso_mapping_providers.html
+++ b/v1.80/sso_mapping_providers.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -442,5 +455,7 @@ specified in the config. It is located at
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/structured_logging.html b/v1.80/structured_logging.html
index a87688c517..4ea8eac1f7 100644
--- a/v1.80/structured_logging.html
+++ b/v1.80/structured_logging.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -254,5 +267,7 @@ remote endpoint at 10.1.2.3:9999.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/synctl_workers.html b/v1.80/synctl_workers.html
index 87b1b0bb57..8dcf649ea3 100644
--- a/v1.80/synctl_workers.html
+++ b/v1.80/synctl_workers.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -208,5 +221,7 @@ notifications.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/systemd-with-workers/index.html b/v1.80/systemd-with-workers/index.html
index 4f3f95444a..957381ebaa 100644
--- a/v1.80/systemd-with-workers/index.html
+++ b/v1.80/systemd-with-workers/index.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -279,5 +292,7 @@ the changes being applied at a glance.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/tcp_replication.html b/v1.80/tcp_replication.html
index 04c1c1b02f..f13573b276 100644
--- a/v1.80/tcp_replication.html
+++ b/v1.80/tcp_replication.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -380,5 +393,7 @@ state</li>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/templates.html b/v1.80/templates.html
index a099c98c60..d2ec859bef 100644
--- a/v1.80/templates.html
+++ b/v1.80/templates.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -467,5 +480,7 @@ When rendering, this template is given two variables:
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/turn-howto.html b/v1.80/turn-howto.html
index 7d3bd18491..a7e4fd86d2 100644
--- a/v1.80/turn-howto.html
+++ b/v1.80/turn-howto.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -342,5 +355,7 @@ entry in the results.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/upgrade.html b/v1.80/upgrade.html
index 3846274443..d3efc7e094 100644
--- a/v1.80/upgrade.html
+++ b/v1.80/upgrade.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -1979,5 +1992,7 @@ in the local HS will automatically rejoin the room.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/usage/administration/admin_api/background_updates.html b/v1.80/usage/administration/admin_api/background_updates.html
index 7eeed7db2b..e0e9ce5c6e 100644
--- a/v1.80/usage/administration/admin_api/background_updates.html
+++ b/v1.80/usage/administration/admin_api/background_updates.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -255,5 +268,7 @@ background updates which won't be cancelled once started.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/usage/administration/admin_api/federation.html b/v1.80/usage/administration/admin_api/federation.html
index 2742f6fdeb..1f6e4aef67 100644
--- a/v1.80/usage/administration/admin_api/federation.html
+++ b/v1.80/usage/administration/admin_api/federation.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -357,5 +370,7 @@ even if the API already returns the http status 200.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/usage/administration/admin_api/index.html b/v1.80/usage/administration/admin_api/index.html
index 1ee941a723..1fc3d5fc23 100644
--- a/v1.80/usage/administration/admin_api/index.html
+++ b/v1.80/usage/administration/admin_api/index.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -217,5 +230,7 @@ information from the Admin API.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/usage/administration/admin_api/registration_tokens.html b/v1.80/usage/administration/admin_api/registration_tokens.html
index b55896013d..4d502cd24d 100644
--- a/v1.80/usage/administration/admin_api/registration_tokens.html
+++ b/v1.80/usage/administration/admin_api/registration_tokens.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -423,5 +436,7 @@ the <a href="https://matrix.org/docs/spec/client_server/r0.6.1#api-standards">Ma
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/usage/administration/admin_faq.html b/v1.80/usage/administration/admin_faq.html
index 7c4602fad7..99a91f6f92 100644
--- a/v1.80/usage/administration/admin_faq.html
+++ b/v1.80/usage/administration/admin_faq.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -395,5 +408,7 @@ you see this failure mode so we can help debug it, however.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/usage/administration/database_maintenance_tools.html b/v1.80/usage/administration/database_maintenance_tools.html
index cdeedc0183..1f2d14c48a 100644
--- a/v1.80/usage/administration/database_maintenance_tools.html
+++ b/v1.80/usage/administration/database_maintenance_tools.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -197,5 +210,7 @@
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/usage/administration/index.html b/v1.80/usage/administration/index.html
index 5517ed230e..a8a4c3d41b 100644
--- a/v1.80/usage/administration/index.html
+++ b/v1.80/usage/administration/index.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -192,5 +205,7 @@
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/usage/administration/monitoring/reporting_homeserver_usage_statistics.html b/v1.80/usage/administration/monitoring/reporting_homeserver_usage_statistics.html
index 83ae341b8b..d83b24c4f4 100644
--- a/v1.80/usage/administration/monitoring/reporting_homeserver_usage_statistics.html
+++ b/v1.80/usage/administration/monitoring/reporting_homeserver_usage_statistics.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -259,5 +272,7 @@ consider using one of the following known implementations:</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/usage/administration/monthly_active_users.html b/v1.80/usage/administration/monthly_active_users.html
index 9400609263..934de898f7 100644
--- a/v1.80/usage/administration/monthly_active_users.html
+++ b/v1.80/usage/administration/monthly_active_users.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -249,5 +262,7 @@ registered accounts on the homeserver.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/usage/administration/request_log.html b/v1.80/usage/administration/request_log.html
index 2ba4afcae1..39c24d3bfd 100644
--- a/v1.80/usage/administration/request_log.html
+++ b/v1.80/usage/administration/request_log.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -220,5 +233,7 @@ small processing times.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/usage/administration/state_groups.html b/v1.80/usage/administration/state_groups.html
index c8b6c2a6fc..df5c56b818 100644
--- a/v1.80/usage/administration/state_groups.html
+++ b/v1.80/usage/administration/state_groups.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -198,5 +211,7 @@
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/usage/administration/understanding_synapse_through_grafana_graphs.html b/v1.80/usage/administration/understanding_synapse_through_grafana_graphs.html
index 2af0d720da..5015d171ac 100644
--- a/v1.80/usage/administration/understanding_synapse_through_grafana_graphs.html
+++ b/v1.80/usage/administration/understanding_synapse_through_grafana_graphs.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -235,5 +248,7 @@ to make use of multiple CPU cores / multiple machines for your homeserver.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/usage/administration/useful_sql_for_admins.html b/v1.80/usage/administration/useful_sql_for_admins.html
index 906918936b..ab2ab8646e 100644
--- a/v1.80/usage/administration/useful_sql_for_admins.html
+++ b/v1.80/usage/administration/useful_sql_for_admins.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -355,5 +368,7 @@ WHERE room_stats_state.room_id = event_json.room_id&quot; | psql -d synapse -h l
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/usage/configuration/config_documentation.html b/v1.80/usage/configuration/config_documentation.html
index 221c910a4d..97b79b3851 100644
--- a/v1.80/usage/configuration/config_documentation.html
+++ b/v1.80/usage/configuration/config_documentation.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -3702,5 +3715,7 @@ Set a size to change the default.</li>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/usage/configuration/homeserver_sample_config.html b/v1.80/usage/configuration/homeserver_sample_config.html
index ebcdf1a703..e7f988222a 100644
--- a/v1.80/usage/configuration/homeserver_sample_config.html
+++ b/v1.80/usage/configuration/homeserver_sample_config.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -239,5 +252,7 @@ trusted_key_servers:
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/usage/configuration/index.html b/v1.80/usage/configuration/index.html
index 1c495971ca..cc6dba8a98 100644
--- a/v1.80/usage/configuration/index.html
+++ b/v1.80/usage/configuration/index.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -188,5 +201,7 @@ file should have been generated when you <a href="../../setup/installation.html"
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/usage/configuration/logging_sample_config.html b/v1.80/usage/configuration/logging_sample_config.html
index 1c284bb5e2..3c607392df 100644
--- a/v1.80/usage/configuration/logging_sample_config.html
+++ b/v1.80/usage/configuration/logging_sample_config.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -272,5 +285,7 @@ disable_existing_loggers: false
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/usage/configuration/user_authentication/index.html b/v1.80/usage/configuration/user_authentication/index.html
index 7547264240..ae85c1a0b4 100644
--- a/v1.80/usage/configuration/user_authentication/index.html
+++ b/v1.80/usage/configuration/user_authentication/index.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -198,5 +211,7 @@ modules.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/usage/configuration/user_authentication/refresh_tokens.html b/v1.80/usage/configuration/user_authentication/refresh_tokens.html
index f5c613a14a..8513f70c8f 100644
--- a/v1.80/usage/configuration/user_authentication/refresh_tokens.html
+++ b/v1.80/usage/configuration/user_authentication/refresh_tokens.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -307,5 +320,7 @@ above requirements will still hold.</em></p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/usage/configuration/user_authentication/single_sign_on/cas.html b/v1.80/usage/configuration/user_authentication/single_sign_on/cas.html
index 0a09ae308b..981d2f7c8f 100644
--- a/v1.80/usage/configuration/user_authentication/single_sign_on/cas.html
+++ b/v1.80/usage/configuration/user_authentication/single_sign_on/cas.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -191,5 +204,7 @@ sections of the configuration manual for more details.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/usage/configuration/user_authentication/single_sign_on/index.html b/v1.80/usage/configuration/user_authentication/single_sign_on/index.html
index 5e392a9f00..edd679d3e2 100644
--- a/v1.80/usage/configuration/user_authentication/single_sign_on/index.html
+++ b/v1.80/usage/configuration/user_authentication/single_sign_on/index.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -189,5 +202,7 @@ auth provider modules.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/usage/configuration/user_authentication/single_sign_on/saml.html b/v1.80/usage/configuration/user_authentication/single_sign_on/saml.html
index a37284424f..be3944e8fa 100644
--- a/v1.80/usage/configuration/user_authentication/single_sign_on/saml.html
+++ b/v1.80/usage/configuration/user_authentication/single_sign_on/saml.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="../../../../docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="../../../../docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="../../../../docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="../../../../docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -191,5 +204,7 @@ file</a> for more details.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="../../../../docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="../../../../docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="../../../../docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/user_directory.html b/v1.80/user_directory.html
index 952d247f8d..902ab06648 100644
--- a/v1.80/user_directory.html
+++ b/v1.80/user_directory.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -240,5 +253,7 @@ different, but this isn't enforced by a constraint.</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/website_files/theme/index.hbs b/v1.80/website_files/theme/index.hbs
index 3b7a5b6163..b169323a43 100644
--- a/v1.80/website_files/theme/index.hbs
+++ b/v1.80/website_files/theme/index.hbs
@@ -131,6 +131,18 @@
                             <i class="fa fa-search"></i>
                         </button>
                         {{/if}}
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">{{ book_title }}</h1>
@@ -309,4 +321,4 @@
         {{/if}}
 
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/website_files/version-picker.css b/v1.80/website_files/version-picker.css
new file mode 100644
index 0000000000..28e5d5219a
--- /dev/null
+++ b/v1.80/website_files/version-picker.css
@@ -0,0 +1,78 @@
+.version-picker {
+    display: flex;
+    align-items: center;
+}
+
+.version-picker .dropdown {
+    width: 130px;
+    max-height: 29px;
+    margin-left: 10px;
+    display: inline-block;
+    border-radius: 4px;
+    border: 1px solid var(--theme-popup-border);
+    position: relative;
+    font-size: 13px;
+    color: var(--fg);
+    height: 100%;
+    text-align: left;
+}
+.version-picker .dropdown .select {
+    cursor: pointer;
+    display: block;
+    padding: 5px 2px 5px 15px;
+}
+.version-picker .dropdown .select > i {
+    font-size: 10px;
+    color: var(--fg);
+    cursor: pointer;
+    float: right;
+    line-height: 20px !important;
+}
+.version-picker .dropdown:hover {
+    border: 1px solid var(--theme-popup-border);
+}
+.version-picker .dropdown:active {
+    background-color: var(--theme-popup-bg);
+}
+.version-picker .dropdown.active:hover,
+.version-picker .dropdown.active {
+    border: 1px solid var(--theme-popup-border);
+    border-radius: 2px 2px 0 0;
+    background-color: var(--theme-popup-bg);
+}
+.version-picker .dropdown.active .select > i {
+    transform: rotate(-180deg);
+}
+.version-picker .dropdown .dropdown-menu {
+    position: absolute;
+    background-color: var(--theme-popup-bg);
+    width: 100%;
+    left: -1px;
+    right: 1px;
+    margin-top: 1px;
+    border: 1px solid var(--theme-popup-border);
+    border-radius: 0 0 4px 4px;
+    overflow: hidden;
+    display: none;
+    max-height: 300px;
+    overflow-y: auto;
+    z-index: 9;
+}
+.version-picker .dropdown .dropdown-menu li {
+    font-size: 12px;
+    padding: 6px 20px;
+    cursor: pointer;
+} 
+.version-picker .dropdown .dropdown-menu {
+    padding: 0;
+    list-style: none;
+}
+.version-picker .dropdown .dropdown-menu li:hover {
+    background-color: var(--theme-hover);
+}
+.version-picker .dropdown .dropdown-menu li.active::before {
+    display: inline-block;
+    content: "✓";
+    margin-inline-start: -14px;
+    width: 14px;
+}
\ No newline at end of file
diff --git a/v1.80/website_files/version-picker.js b/v1.80/website_files/version-picker.js
new file mode 100644
index 0000000000..bb35a7d896
--- /dev/null
+++ b/v1.80/website_files/version-picker.js
@@ -0,0 +1,127 @@
+
+const dropdown = document.querySelector('.version-picker .dropdown');
+const dropdownMenu = dropdown.querySelector('.dropdown-menu');
+
+fetchVersions(dropdown, dropdownMenu).then(() => {
+    initializeVersionDropdown(dropdown, dropdownMenu);
+});
+
+/**
+ * Initialize the dropdown functionality for version selection.
+ * 
+ * @param {Element} dropdown - The dropdown element.
+ * @param {Element} dropdownMenu - The dropdown menu element.
+ */
+function initializeVersionDropdown(dropdown, dropdownMenu) {
+    // Toggle the dropdown menu on click
+    dropdown.addEventListener('click', function () {
+        this.setAttribute('tabindex', 1);
+        this.classList.toggle('active');
+        dropdownMenu.style.display = (dropdownMenu.style.display === 'block') ? 'none' : 'block';
+    });
+  
+    // Remove the 'active' class and hide the dropdown menu on focusout
+    dropdown.addEventListener('focusout', function () {
+        this.classList.remove('active');
+        dropdownMenu.style.display = 'none';
+    });
+  
+    // Handle item selection within the dropdown menu
+    const dropdownMenuItems = dropdownMenu.querySelectorAll('li');    
+    dropdownMenuItems.forEach(function (item) {
+        item.addEventListener('click', function () {
+            dropdownMenuItems.forEach(function (item) {
+                item.classList.remove('active');
+            });
+            this.classList.add('active');
+            dropdown.querySelector('span').textContent = this.textContent;
+            dropdown.querySelector('input').value = this.getAttribute('id');
+
+            window.location.href = changeVersion(window.location.href, this.textContent);
+        });
+    });
+};
+
+/**
+ * This function fetches the available versions from a GitHub repository
+ * and inserts them into the version picker.
+ * 
+ * @param {Element} dropdown - The dropdown element.
+ * @param {Element} dropdownMenu - The dropdown menu element.
+ * @returns {Promise<Array<string>>} A promise that resolves with an array of available versions.
+ */
+function fetchVersions(dropdown, dropdownMenu) {
+    return new Promise((resolve, reject) => {
+        window.addEventListener("load", () => {
+
+            fetch("https://api.github.com/repos/matrix-org/synapse/git/trees/gh-pages", {
+                cache: "force-cache",
+            }).then(res => 
+                res.json()
+            ).then(resObject => {
+                const excluded = ['dev-docs', 'v1.91.0', 'v1.80.0', 'v1.69.0'];
+                const tree = resObject.tree.filter(item => item.type === "tree" && !excluded.includes(item.path));
+                const versions = tree.map(item => item.path).sort(sortVersions);
+
+                // Create a list of <li> items for versions
+                versions.forEach((version) => {
+                    const li = document.createElement("li");
+                    li.textContent = version;
+                    li.id = version;
+    
+                    if (window.SYNAPSE_VERSION === version) {
+                        li.classList.add('active');
+                        dropdown.querySelector('span').textContent = version;
+                        dropdown.querySelector('input').value = version;
+                    }
+    
+                    dropdownMenu.appendChild(li);
+                });
+
+                resolve(versions);
+
+            }).catch(ex => {
+                console.error("Failed to fetch version data", ex);
+                reject(ex);
+            })
+        });
+    });
+}
+
+/**
+ * Custom sorting function to sort an array of version strings.
+ *
+ * @param {string} a - The first version string to compare.
+ * @param {string} b - The second version string to compare.
+ * @returns {number} - A negative number if a should come before b, a positive number if b should come before a, or 0 if they are equal.
+ */
+function sortVersions(a, b) {
+    // Put 'develop' and 'latest' at the top
+    if (a === 'develop' || a === 'latest') return -1;
+    if (b === 'develop' || b === 'latest') return 1;
+
+    const versionA = (a.match(/v\d+(\.\d+)+/) || [])[0];
+    const versionB = (b.match(/v\d+(\.\d+)+/) || [])[0];
+
+    return versionB.localeCompare(versionA);
+}
+
+/**
+ * Change the version in a URL path.
+ *
+ * @param {string} url - The original URL to be modified.
+ * @param {string} newVersion - The new version to replace the existing version in the URL.
+ * @returns {string} The updated URL with the new version.
+ */
+function changeVersion(url, newVersion) {
+    const parsedURL = new URL(url);
+    const pathSegments = parsedURL.pathname.split('/');
+  
+    // Modify the version
+    pathSegments[2] = newVersion;
+
+    // Reconstruct the URL
+    parsedURL.pathname = pathSegments.join('/');
+  
+    return parsedURL.href;
+}
\ No newline at end of file
diff --git a/v1.80/website_files/version.js b/v1.80/website_files/version.js
new file mode 100644
index 0000000000..41de2c86a7
--- /dev/null
+++ b/v1.80/website_files/version.js
@@ -0,0 +1 @@
+window.SYNAPSE_VERSION = 'v1.80';
diff --git a/v1.80/welcome_and_overview.html b/v1.80/welcome_and_overview.html
index d853008a2f..dca5bc0e4c 100644
--- a/v1.80/welcome_and_overview.html
+++ b/v1.80/welcome_and_overview.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -264,5 +277,7 @@ Policy</a>. Thank you!</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/v1.80/workers.html b/v1.80/workers.html
index 5392984108..f1388dcedb 100644
--- a/v1.80/workers.html
+++ b/v1.80/workers.html
@@ -28,6 +28,7 @@
         <link rel="stylesheet" href="docs/website_files/table-of-contents.css">
         <link rel="stylesheet" href="docs/website_files/remove-nav-buttons.css">
         <link rel="stylesheet" href="docs/website_files/indent-section-headers.css">
+        <link rel="stylesheet" href="docs/website_files/version-picker.css">
     </head>
     <body>
         <!-- Provide site root to javascript -->
@@ -103,6 +104,18 @@
                         <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
+                        <div class="version-picker">
+                            <div class="dropdown">
+                                <div class="select">
+                                    <span></span>
+                                    <i class="fa fa-chevron-down"></i>
+                                </div>
+                                <input type="hidden" name="version">
+                                <ul class="dropdown-menu">
+                                    <!-- Versions will be added dynamically in version-picker.js -->
+                                </ul>
+                            </div>
+                        </div>      
                     </div>
 
                     <h1 class="menu-title">Synapse</h1>
@@ -834,5 +847,7 @@ in systemd service files, but not required for synctl).</p>
 
         <!-- Custom JS scripts -->
         <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script>
+        <script type="text/javascript" src="docs/website_files/version-picker.js"></script>
+        <script type="text/javascript" src="docs/website_files/version.js"></script>
     </body>
-</html>
\ No newline at end of file
+</html>
author	Action Bot <action@synapse.bot.com>	2023-12-11 14:54:37 +0000
committer	Action Bot <action@synapse.bot.com>	2023-12-11 14:54:37 +0000
commit	3a344f65887d5277b80984944b6cac048da22efb (patch)
tree	6301dc15783b4cb844e1fc938d5e7606b3d2159f
parent	Version picker deployed for v1.81 docs to Github Pages (diff)
download	synapse-3a344f65887d5277b80984944b6cac048da22efb.tar.xz