help: Add a dedicated page on how to format lists.

- Updates example and screenshot for numbered lists.

help/bulleted-and-numbered-lists.md

@@ -0,0 +1,11 @@
+# Bulleted and numbered lists
+
+Zulip supports Markdown formatting for bulleted and numbered lists.
+
+{!format-lists.md!}
+
+## Related articles
+
+* [Message formatting](/help/format-your-message-using-markdown)
+* [Preview messages before sending](/help/preview-your-message-before-sending)
+* [Resize the compose box](/help/resize-the-compose-box)

help/format-your-message-using-markdown.md

@@ -14,7 +14,8 @@ reference**](#message-formatting-reference) in the Zulip app that you can use
 whenever you need a reminder of the formatting syntax below.
 
 * [Text emphasis](#text-emphasis)
-* [Lists](#lists)
+* [Bulleted lists](#bulleted-lists)
+* [Numbered lists](#numbered-lists)
 * [Links and images](#links)
 * [Code blocks](#code)
 * [LaTeX](#latex)
@@ -37,33 +38,7 @@ whenever you need a reminder of the formatting syntax below.
     <kbd>B</kbd> or <kbd>Ctrl</kbd> + <kbd>I</kbd>) to make text bold or italic.
     [Learn more](/help/text-emphasis).
 
-## Lists
-
-Bulleted lists
-```
-* bulleted lists
-  * with sub-bullets too
-  * sub-bullets start with 2 spaces
-    * start sub-sub-bullets with 4 spaces
-* multi
-line
-bullet
-- dashes and
-+ pluses are ok too
-```
-
-![Markdown bullets](/static/images/help/markdown-bullets.png)
-
-Numbered lists
-
-```
-1. numbered lists
-1. increment automatically
-1. one more
-```
-
-![Markdown numbered lists](/static/images/help/markdown-numbered-lists.png)
-
+{!format-lists.md!}
 
 ## Links
 

help/include/format-lists.md

@@ -0,0 +1,45 @@
+## Bulleted lists
+
+You can create bulleted lists using `*`, `-`, or `+` at the start of each line.
+Add two spaces before the bullet to create a nested list.
+
+### What you type
+
+```
+* bulleted lists
+  * with sub-bullets too
+  * sub-bullets start with 2 spaces
+    * start sub-sub-bullets with 4 spaces
+* multi
+line
+bullet
+- dashes and
++ pluses are ok too
+```
+
+### What it looks like
+
+![Markdown bullets](/static/images/help/markdown-bullets.png)
+
+## Numbered lists
+
+You can create numbered lists by putting a number followed by a `.` at the start
+of each line. Lists are numbered automatically, so you can reorder list items
+while editing your message without having to update the numbers. Add two spaces
+before the number to create a nested list.
+
+### What you type
+
+```
+1. numbered lists
+1. increment automatically
+   1. use nested lists if you like
+   3. delete or reorder lines without fixing the numbering
+1. one more
+   17. lists can start at any number
+   18. so you can continue a list after some other text
+```
+
+### What it looks like
+
+![Markdown numbered lists](/static/images/help/markdown-numbered-lists.png)

help/include/sidebar_index.md

@@ -63,6 +63,7 @@
 * [Share and upload files](/help/share-and-upload-files)
 * [Add GIFs in your message](/help/animated-gifs-from-giphy)
 * [Text emphasis](/help/text-emphasis)
+* [Bulleted and numbered lists](/help/bulleted-and-numbered-lists)
 * [Code blocks](/help/code-blocks)
 * [Create a poll](/help/create-a-poll)
 * [Start a video call](/help/start-a-call)