How do I print multiple pages per sheet?
If you want to conserve paper or don't want to carry around a lot of paper, it is possible to print multiple pages on a single sheet of paper.
There are two utilities for setting multiple pages on one piece of paper. They are called mpage and psnup
You can send this output straight to the printer to avoid creating temporary files:
mpage -2 file.ps -Pprinter
See the man page for more info (type man mpage).
Sometimes mpage will fail on complex PostScript pages.