- Tab indents the whole line you're on (or every line in a selection) —
-then Tab makes a nested item, wherever the caret sits. Inside a code fence it's a plain tab. - Shift-Tab outdents one level: a tab, or up to four spaces.
- Tabs render four columns wide instead of at AppKit's odd 28-point stops.
Install or upgrade with Homebrew: brew upgrade --cask write-md