The editor applies OneNote's Basic Text commands: bold, italic,
underline, strikethrough, sub- and superscript, font, size, colour,
highlight and clearing to the selection or the caret's next text;
bullets, numbering, indent, outdent and alignment to the paragraphs it
touches; To Do and Question tags and check boxes. Each is one undo step,
and format_state reports what the toolbar should show as pressed.
Numbered lists render, so outlines holding them open editable.

Assisted-by: claude-opus-5.5
Assisted-by: claude-opus-5