help: Add a dedicated page on how to format paragraphs and sections.

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

@@ -27,7 +27,7 @@ whenever you need a reminder of the formatting syntax below.
 * [Global times](#global-times)
 * [Tables](#tables)
 * [Collaborative to-do lists](#collaborative-to-do-lists)
-* [Paragraphs and lines](#paragraphs-and-lines)
+* [Paragraph and section formatting](#paragraph-and-section-formatting)
 
 ## Text emphasis
 
@@ -116,23 +116,11 @@ whenever you need a reminder of the formatting syntax below.
 
 {!to-do-lists-examples.md!}
 
-## Paragraphs and lines
+## Paragraph and section formatting
 
-```
-One blank space for a new paragraph
-New line, same paragraph
+{!paragraphs-and-sections-intro.md!}
 
-New paragraph
-
----, ***, or ___ for a horizontal line
-Over the line
-
----
-
-Under the line
-```
-
-![Markdown paragraph](/static/images/help/markdown-paragraph.png)
+{!paragraphs-and-sections-examples.md!}
 
 ## Message formatting reference
 

help/include/paragraphs-and-sections-examples.md

@@ -0,0 +1,19 @@
+### What you type
+
+```
+One blank space for a new paragraph
+New line, same paragraph
+
+New paragraph
+
+---, ***, or ___ for a horizontal line
+Over the line
+
+---
+
+Under the line
+```
+
+### What it looks like
+
+![Markdown paragraph](/static/images/help/markdown-paragraph.png)

help/include/paragraphs-and-sections-intro.md

@@ -0,0 +1,3 @@
+Zulip supports Markdown formatting for paragraphs and visual section breaks,
+which you can use to control the layout of your text and to visually separate
+different sections of content.

help/include/sidebar_index.md

@@ -65,6 +65,7 @@
 * [Share and upload files](/help/share-and-upload-files)
 * [Add GIFs in your message](/help/animated-gifs-from-giphy)
 * [Text emphasis](/help/text-emphasis)
+* [Paragraph and section formatting](/help/paragraph-and-section-formatting)
 * [Bulleted and numbered lists](/help/bulleted-and-numbered-lists)
 * [Tables](/help/tables)
 * [Code blocks](/help/code-blocks)

help/paragraph-and-section-formatting.md

@@ -0,0 +1,13 @@
+# Paragraph and section formatting
+
+{!paragraphs-and-sections-intro.md!}
+
+## Examples
+
+{!paragraphs-and-sections-examples.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)