This is a collection of dvips PostScript header and dvips config files. They
control certain features of the printer, including: A4, A3, usletter, simplex,
duplex / long edge, duplex / short edge, screen frequencies of images,
black/white invers, select transparency / paper for tektronix 550/560, manual
feeder, envelope feeder, and tray 1, 2 and 3, and printing a PostScript grid
underneath the page material--very useful for measuring and eliminating paper
feed errors!