diff --git a/CHANGELOG b/CHANGELOG
index eaf07456a..db6a3b244 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,8 @@
+mkdocs-material-8.5.11+insiders-4.27.0 (2022-12-21)
+
+  * Added built-in typeset plugin to preserve formatting in sidebars
+  * Added URL and table of contents support for blog categories
+
 mkdocs-material-8.5.11 (2022-11-30)
 
   * Let it snow, see https://twitter.com/squidfunk/status/1597939243090788352
diff --git a/docs/insiders/changelog.md b/docs/insiders/changelog.md
index 94b73d969..9f28932a9 100644
--- a/docs/insiders/changelog.md
+++ b/docs/insiders/changelog.md
@@ -2,6 +2,11 @@
 
 ## Material for MkDocs Insiders
 
+### 4.27.0 <small>_ December 21, 2022</small> { id="4.27.0" }
+
+- Added built-in typeset plugin to preserve formatting in sidebars
+- Added URL and table of contents support for blog categories
+
 ### 4.26.6 <small>_ November 28, 2022</small> { id="4.26.6" }
 
 - Fixed #4683: Tags plugin crashes when a tag is empty
diff --git a/docs/insiders/index.md b/docs/insiders/index.md
index c1cc476b0..5aa5a4712 100644
--- a/docs/insiders/index.md
+++ b/docs/insiders/index.md
@@ -88,14 +88,15 @@ a handful of them, [thanks to our awesome sponsors]!
 ## What's in it for me?
 
 The moment you [become a sponsor][how to become a sponsor], you'll get __immediate
-access to 19 additional features__ that you can start using right away, and
+access to 20 additional features__ that you can start using right away, and
 which are currently exclusively available to sponsors:
 
 <div class="mdx-columns" markdown>
 
+- [x] [Typeset plugin]: :material-alert-decagram:{ .mdx-pulse title="Added on December 21, 2022" }
 - [x] [Privacy plugin: external links] :material-alert-decagram:{ .mdx-pulse title="Added on October 18, 2022" }
 - [x] [Navigation subtitles] :material-alert-decagram:{ .mdx-pulse title="Added on October 2, 2022" }
-- [x] [Tags plugin: allow list] + [custom sorting] :material-alert-decagram:{ .mdx-pulse title="Added on October 2, 2022" }
+- [x] [Tags plugin: allow list] + [custom sorting]
 - [x] [Blog plugin: custom index pages]
 - [x] [Blog plugin: related links]
 - [x] [Blog plugin]
@@ -295,10 +296,12 @@ are released for general availability.
 
 #### $ 20,000 – Jalapeño
 
+- [x] [Typeset plugin]
 - [x] [Privacy plugin: external links]
 - [ ] [Instant previews]
 - ... more to be announced
 
+  [Typeset plugin]: ../reference/index.md#built-in-typeset-plugin
   [Privacy plugin: external links]: ../setup/ensuring-data-privacy.md#+privacy.external_links
   [Instant previews]: https://twitter.com/squidfunk/status/1466794654213492743
 
diff --git a/docs/reference/index.md b/docs/reference/index.md
index 49a90db22..ea933321d 100644
--- a/docs/reference/index.md
+++ b/docs/reference/index.md
@@ -7,7 +7,7 @@ within Markdown files.
 
 ## Configuration
 
-### Built-in <u>typeset</u> plugin
+### Built-in <u>typeset</u> plugin :material-alert-decagram:{ .mdx-pulse title="Added on December 21, 2022" }
 
 [:octicons-heart-fill-24:{ .mdx-heart } Sponsors only][Insiders]{ .mdx-insiders } ·
 [:octicons-tag-24: insiders-4.27.0][Insiders] ·
@@ -198,7 +198,7 @@ The following status identifiers are currently supported:
 - :material-alert-decagram: – `new`
 - :material-trash-can: – `deprecated`
 
-### Setting the page `subtitle`
+### Setting the page `subtitle` :material-alert-decagram:{ .mdx-pulse title="Added on October 2, 2022" }
 
 [:octicons-heart-fill-24:{ .mdx-heart } Sponsors only][Insiders]{ .mdx-insiders } ·
 [:octicons-tag-24: insiders-4.25.0][Insiders] ·
diff --git a/docs/schema/plugins/blog.json b/docs/schema/plugins/blog.json
index 8ad54ff67..c877a3e36 100644
--- a/docs/schema/plugins/blog.json
+++ b/docs/schema/plugins/blog.json
@@ -68,7 +68,9 @@
               "oneOf": [
                 {
                   "enum": [
+                    "\"{date}/{file}\"",
                     "\"{date}/{slug}\"",
+                    "\"{file}\"",
                     "\"{slug}\""
                   ]
                 },
@@ -77,6 +79,12 @@
                 }
               ]
             },
+            "post_url_max_categories": {
+              "title": "Number of categories in post URLs",
+              "markdownDescription": "https://squidfunk.github.io/mkdocs-material/setup/setting-up-a-blog/#+blog.post_url_max_categories",
+              "type": "number",
+              "default": 1
+            },
             "post_slugify": {
               "title": "Post slugify function",
               "markdownDescription": "https://squidfunk.github.io/mkdocs-material/setup/setting-up-a-blog/#+blog.post_slugify",
@@ -233,6 +241,12 @@
               "type": "string",
               "default": "\"-\""
             },
+            "categories_toc": {
+              "title": "Category index table of contents",
+              "markdownDescription": "https://squidfunk.github.io/mkdocs-material/setup/setting-up-a-blog/#+blog.categories_toc",
+              "type": "boolean",
+              "default": false
+            },
             "categories_allowed": {
               "title": "Categories allowed",
               "markdownDescription": "https://squidfunk.github.io/mkdocs-material/setup/setting-up-a-blog/#+blog.categories_allowed",
diff --git a/docs/setup/setting-up-a-blog.md b/docs/setup/setting-up-a-blog.md
index 9eab7b222..e4291720c 100644
--- a/docs/setup/setting-up-a-blog.md
+++ b/docs/setup/setting-up-a-blog.md
@@ -210,6 +210,8 @@ The following configuration options are available for posts:
     format string that is used for the URL of the post. The following
     placeholders are currently supported:
 
+    - `categories` – Replaced with the post's slugified [categories].
+
     - `date` – Replaced with the post's date, as configured in
       [`post_url_date_format`][post_url_date_format].
 
@@ -237,6 +239,20 @@ The following configuration options are available for posts:
     collide with other the URLs of other pages added to the blog section, as
     this leads to undefined behavior.
 
+[`post_url_max_categories`](#+blog.post_url_max_categories){ #+blog.post_url_max_categories }
+
+:   :octicons-milestone-24: Default: `1` – This option specifies the number of
+    categories that are included in the URL if the `categories` placeholder is
+    part of [`post_url_format`][post slugs]. If a post is assigned to multiple
+    categories, they are joined with `/`:
+
+    ``` yaml
+    plugins:
+      - blog:
+          post_url_format: "{categories}/{slug}"
+          post_url_max_categories: 2
+    ```
+
 [`post_slugify`](#+blog.post_slugify){ #+blog.post_slugify }
 
 :   :octicons-milestone-24: Default: `headerid.slugify` – This option specifies
@@ -488,7 +504,7 @@ The following configuration options are available for category index generation:
 [`categories`](#+blog.categories){ #+blog.categories }
 
 :   :octicons-milestone-24: Default: `true` – This option specifies whether the
-    [built-in blog plugin] should generate category indexes. A category indexes
+    [built-in blog plugin] should generate category indexes. A category index
     shows all posts for a specific category in reverse chronological order. If
     you want to disable category index generation, add:
 
@@ -514,8 +530,8 @@ The following configuration options are available for category index generation:
 [`categories_url_format`](#+blog.categories_url_format){ #+blog.categories_url_format }
 
 :   :octicons-milestone-24: Default: `category/{slug}` – This option specifies
-    the format string that is used for the URL of the category index, and can
-    be used to localize the URL:
+    the format string that is used for the URL of a category index, and can be
+    used to localize the URL:
 
     === ":material-link: blog/category/:material-dots-horizontal:/"
 
@@ -570,6 +586,18 @@ The following configuration options are available for category index generation:
           categories_slugify_separator: "-"
     ```
 
+[`categories_toc`](#+blog.categories_toc){ #+blog.categories_toc }
+
+:   :octicons-milestone-24: Default: `false` – This option specifies whether a
+    category index includes a table of contents with all post titles on the
+    right side as an overview:
+
+    ``` yaml
+    plugins:
+      - blog:
+          categories_toc: true
+    ```
+
 [`categories_allowed`](#+blog.categories_allowed){ #+blog.categories_allowed }
 
 :   :octicons-milestone-24: Default: _none_ – This option specifies the
diff --git a/docs/setup/setting-up-tags.md b/docs/setup/setting-up-tags.md
index 9ef2a659d..8b84cecc6 100644
--- a/docs/setup/setting-up-tags.md
+++ b/docs/setup/setting-up-tags.md
@@ -160,7 +160,7 @@ The following configuration options are available:
           tags_compare_reverse: true
     ```
 
-[`tags_allowed`](#+tags.tags_allowed){ #+tags.tags_allowed } :material-alert-decagram:{ .mdx-pulse title="Added on October 2, 2022" }
+[`tags_allowed`](#+tags.tags_allowed){ #+tags.tags_allowed }
 
 :   [:octicons-tag-24: insiders-4.25.0][Insiders] · :octicons-milestone-24: 
     Default: _none_ – This option allows the author to define explicitly which