Dynamic Headline Numbering (The Org Manual)

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### 16.5 Dynamic Headline Numbering

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-max-level`, `org-num-skip-tags`, `org-num-skip-commented`, `org-num-skip-unnumbered`, or `org-num-skip-footnotes` accordingly.

If `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 `org-num-face` and `org-num-format-function`.