This is the official manual for the latest Org-mode release.

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12.14.6 Headings and sectioning structure

The Texinfo export back-end uses a pre-defined scheme to convert Org headlines to an equivalent Texinfo structuring commands. A scheme like this maps top-level headlines to numbered chapters tagged as @chapter and lower-level headlines to unnumbered chapters tagged as @unnumbered. To override such mappings to introduce @part or other Texinfo structuring commands, define a new class in org-texinfo-classes. Activate the new class with the #+TEXINFO_CLASS keyword. When no new class is defined and activated, the Texinfo export back-end defaults to the org-texinfo-default-class.

If an Org headline's level has no associated Texinfo structuring command, or is below a certain threshold (see Export settings), then the Texinfo export back-end makes it into a list item.

The Texinfo export back-end makes any headline with a non-nil :APPENDIX: property into an appendix. This happens independent of the Org headline level or the #+TEXINFO_CLASS.

The Texinfo export back-end creates a menu entry after the Org headline for each regular sectioning structure. To override this with a shorter menu entry, use the :ALT_TITLE: property (see Table of contents). Texinfo menu entries also have an option for a longer :DESCRIPTION: property. Here's an example that uses both to override the default menu entry:

     * Controlling Screen Display
       :ALT_TITLE: Display
       :DESCRIPTION: Controlling Screen Display

The text before the first headline belongs to the ‘Top’ node, i.e., the node in which a reader enters an Info manual. As such, it is expected not to appear in printed output generated from the .texi file. see The Top Node, for more information.