### 3.2.2 Start of Header

A start-of-header line is a Texinfo comment that looks like this:

    @c %**start of header

Write the start-of-header line on the second line of a Texinfo file. Follow the start-of-header line with `@setfilename` and `@settitle` lines and, optionally, with other commands that globally affect the document formatting, such as `@synindex` or `@footnotestyle`; and then by an end-of-header line (see End of Header).

The start- and end-of-header lines allow you to format only part of a Texinfo file for Info or printing. See texinfo-format commands.

The odd string of characters, ‘`%**`’, is to ensure that no other comment is accidentally taken for a start-of-header line. You can change it if you wish by setting the `tex-start-of-header` and/or `tex-end-of-header` Emacs variables. See Texinfo Mode Printing.