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#### 12.11.3 Headings and sectioning structure

‘`texinfo`’ uses a pre-defined scheme, or class, to convert headlines into Texinfo structuring commands. For example, a top level headline appears as `@chapter` if it should be numbered or as `@unnumbered` otherwise. If you need to use a different set of commands, e.g., to start with `@part` instead of `@chapter`, install a new class in `org-texinfo-classes`, then activate it with `#+TEXINFO_CLASS` keyword. Export process defaults to `org-texinfo-default-class` when there is no such keyword in the document.

If a headline’s level has no associated structuring command, or is below a certain threshold see Export settings, that headline becomes a list in Texinfo output.

As an exception, a headline with a non-nil `:APPENDIX:` property becomes an appendix, independently on its level and the class used.

Each regular sectioning structure creates a menu entry, named after the heading. You can provide a different, e.g., shorter, title in `:ALT_TITLE:` property (see Table of contents). Optionally, you can specify a description for the item in `:DESCRIPTION:` property. E.g.,

    * Controlling Screen Display
      :PROPERTIES:
      :ALT_TITLE: Display
      :DESCRIPTION: Controlling Screen Display
      :END: