pr-print-using-ghostscript

pr-print-using-ghostscript is a variable defined in `printing.el'.
Its value is

nil

Documentation:
Non-nil means print using ghostscript.

This is useful if you don't have a PostScript printer, so you could use the
ghostscript to print a PostScript file.

In GNU or Unix system, if ghostscript is set as a PostScript filter, this
variable should be nil.

You can customize this variable.