A closer look at the result

Use Control-Command-3 for Split Preview. Edit the source and check headings, lists, and tables alongside it. Switch to a single view when you need more space.

Give both panes enough space

Split Preview is free, with unlimited notes. A narrow Mac window gives each pane less space. The preview is a rendering of your file, not a separate saved copy.

Free writing stays available

MarkThatDown has no free note limit. Optional Pro access is available monthly, annually, or through a one-time lifetime purchase. Apple shows your local price and eligible offers before purchase.