Options: -2Z
Printer: doc  | gzip -c > $d/doc-$N.ps.gz
UserOption: doc -2ZPdoc
Printer: book  | psbook | psnup -2 | pstumble | gzip -c > $d/book-$N.ps.gz
Printer: cover | psselect 2,1 | psnup -2 | gzip -c > $d/cover-$N.ps.gz
