Several options may be set in the PostScript driver.

 Syntax:
         set terminal postscript {} {} {}
                                 {""} {}

 where  is landscape, portrait, eps or default.
 Selecting default sets all options to their defaults.
  is either color or monochrome.
  is either solid or dashed.
 "" is the name of a valid PostScript font.
  is the size of the font in PostScript points.
 Defaults are landscape, monochrome, dashed, "Helvetica", and 14pt.
 Default size of PostScript plot is landscape mode 10 inches wide
 and 7 inches high.

 To get EPS output, use the eps mode and make only one plot per file.
 In eps mode the whole plot is halved in size; the fonts are half the
 given size, and the plot is 5 inches wide and 3.5 inches high.

 Examples:

         set term postscript default       # old postscript
         set term postscript landscape 22  # old psbig
         set term postscript eps 14   # old epsf1
         set term postscript eps 22   # old epsf2
         set size 0.7,1.4
         set term post portrait color "Times-Roman" 14