Editor toolbar
Formatting commands: Bold, Italic, Strikethrough, Title (heading), Link, Quote, Code block, Comment, Table, Bulleted list, Numbered list, Insert and Maximize.

#Worth knowing
There are no toolbar buttons for horizontal rules, inline code, checklists or image upload. Type the Markdown for those directly.
#Where to find it
Editor modal
#Where you do it
Task | Where |
|---|---|
Edit a Markdown document | Issue view > Markdown panel > Edit |
Add a diagram | Editor > Insert > From code, or write a fenced block yourself |
Add an image | Editor > Insert > From web, or plain Markdown image syntax |
#Settings that affect this
Setting | Where | What it does |
|---|---|---|
View / Edit (editor mode) | Editor modal | For an existing document, View switches to a read-only preview and Edit switches back to editing. Save only shows while you are editing. |
Title | Editor modal | Up to 50 characters. Becomes the attachment's filename. |
#A few things that catch people out
There is no image upload from the editor. Images must be referenced by URL.
The toolbar has no diagram button. Use Insert > From code, or write a fenced code block yourself.
#Related
How it actually behaves.
