postscript (S) This parameter forces a printer to interpret the print files as postscript. This is done by adding a %! to the start of print output. This is most useful when you have lots of PCs that persist in putting a control-D at the start of print jobs, which then confuses your printer. Would a control-D cause a blank page to spit out? When I have this option turned on, sometimes I get a %! on a blank page before my document prints.