/REQUIRE=filespec
       /NOREQUIRE (default)

    Allows you to change the heading on the first page of an index.
    The default heading is the word INDEX centered on the page
    and followed by three blank lines. The substitute heading is
    contained in the file you specify, which can contain DSR commands
    and text.

    To change the heading:

    1. Create or edit a file that specifies the format and the text
       that you want as the heading on the first index page.

    2. Use the file you create as the filespec parameter for the
       /REQUIRE qualifier.

    When you use the /REQUIRE qualifier, the default heading for the
    first page of the index is not generated. Your file must provide
    the heading. The file can contain DSR commands and text that you
    want to appear at the top of the first page of the index, or it
    can contain only DSR commands. For example, you can put the DSR
    command .FIGURE 10 in the file. This command generates 10 lines
    of white space at the top of the first page of the index. You
    can use these blank lines for later pasteup. For a sample file
    that changes the index heading, see the OpenVMS DIGITAL Standard
    Runoff Reference Manual.

    If you are adding lines of text or white space to the heading
    on the first page of the index, you must allow space for this
    addition. Use the /RESERVE=n qualifier to provide the space you
    need.

    See the /RESERVE qualifier for more information.