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### 21.8 TeX Formatting Requirements Summary

Every Texinfo file that is to be input to TeX must begin with a `\input` command and must contain an `@setfilename` command:

```\input texinfo
@setfilename arg-not-used-by-TeX
```

The first command instructs TeX to load the macros it needs to process a Texinfo file and the second command opens auxiliary files.

Every Texinfo file must end with a line that terminates TeX’s processing and forces out unfinished pages:

```@bye
```

Strictly speaking, these lines are all a Texinfo file needs to be processed successfully by TeX.

Usually, however, the beginning includes an `@settitle` command to define the title of the printed manual, an `@setchapternewpage` command, a title page, a copyright page, and permissions. Besides an `@bye`, the end of a file usually includes indices and a table of contents. (And of course most manuals contain a body of text as well.)