psrev - PostScript page reversal filter
psrev reverses the order of the pages of a PostScript document. Usually
psrev is used with printers that stack face up and is run automatically
by the spooler. The document must conform to the Adobe Document Structuring
Conventions, preferably version 3.0.
psrev respects the %%PageOrder: comment: if this
comment is present and has an argument other than Ascend the document
will not be reversed. A document reversed by psrev will contain a
%%PageOrder: Descend comment.
textps(1), lprps(8), psif(8)