pr-gs-device

pr-gs-device is a variable defined in `printing.el'.
Its value is

"uniprint"

Documentation:
Specify the ghostscript device switch value (-sDEVICE=).

A note on the gs switches:

-sDEVICE=djet500 the printer - works with HP DeskJet 540

See `pr-gs-switches' for documentation.
See also `pr-ps-printer-alist'.

You can customize this variable.