detects basically the same set of errors whether it is viewing or
printing a DVI file. In the latter case the error messages appear in
the window along with a beep.
If you've been sensible and previewed the DVI file before printing it then
you should have discovered nearly all the errors (and fixed them).
To avoid wasting paper you should always view a DVI file before printing it
and choose ``Page Info'' to check for any missing fonts
(but don't worry about missing screen fonts if you have a PostScript printer).
Another way to check for errors is to send PostScript output to a file
instead of the printer, although this won't detect certain errors that
can only occur with a non-PostScript printer.
Subsections