The Org Num minor mode, toggled with M-x org-num-mode, displays outline numbering on top of headlines. It also updates it automatically upon changes to the structure of the document.
By default, all headlines are numbered. You can limit numbering to
specific headlines according to their level, tags, ‘COMMENT’ keyword,
or ‘UNNUMBERED’ property. Set
org-num-skip-footnotes is non-
nil, footnotes sections (see
Creating Footnotes) are not numbered either.
You can control how the numbering is displayed by setting