Markdown

A Markdown file in the visual editor, with three parts marked
  1. Visual / Source. Switch editors at any time.
  2. Toolbar. Adds strikethrough and task lists. Underline, color, superscript and subscript are not in Markdown.
  3. Contents. The headings of the file. Click one to go there.

Start a file with File › New › Markdown File.

Not in Markdown

No citations, cross-references, or equation, figure and table numbers. Comments and suggestions work.