(a2ps.info)Special Printers

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2.2.2 Special Printers
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There are three special printers pre-defined.

   The first one, 'void', sends the output to the trash.  Its main use
is to see how many pages would have been used.
     gargantua ~ $ a2ps -P void parsessh.c
     [parsessh.c (C): 33 pages on 17 sheets]
     [Total: 33 pages on 17 sheets] sent to the printer `void'

   The second, 'display' sends the output to 'Ghostview', so that you
can check the output without printing.  Of course if you don't have
'Ghostview', it won't work...  And it is up to you to configure another
displaying application (Note: Your Printers).

   The last, 'file' saves the output into a file named after the file
you printed (e.g., saves into 'foo.ps' when you print 'foo.c').