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(groff)Postprocessor Access

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Postprocessor Access
====================

   There are two escapes which give information directly to the
postprocessor.  This is particularly useful for embedding POSTSCRIPT
into the final document.

 - Escape: \X'XXX'
     Embeds its argument into the `gtroff' output preceded with `x X'.

 - Escape: \Y'XXX'
     The `\Y' escape is called with an identifier (i.e.  `\YX', `\Y(XX'
     or `\Y[XXX]').  This is approximately equivalent to `\X'\*[XXX]''.
     However, the contents of the string or macro XXX are not
     interpreted; also it is permitted for XXX to have been defined as
     a macro and thus contain newlines (it is not permitted for the
     argument to `\X' to contain newlines).  The inclusion of newlines
     requires an extension to the UNIX `troff' output format, and
     confuses drivers that do not know about this extension.

   Note: Output Devices.