Geometer can only produce a PostScript file, so you will need some method to print that file. For example, if you have a PC, you can download GhostScript for free from http://www.cs.wisc.edu/~ghost/ and use that as a printing engine.
Your system may have other methods to print PostScript files, and any of those should also work.
If you are having trouble printing, here are some details that may help you:
Then if you know how to print EPS files, just print this one outside the Geometer program.
For example, on a Windows NT 4.0 system with GhostScript installed, one possible way to print the file called test.eps with an attached HP LaserJet printer from a command shell is:
gswin32 -sDEVICE=laserjet -dBATCH -dNOPAUSE test.eps
To make Geometer use this command to print, place this text in the Print cmd: input area in the Options dialog:
gswin32 -sDEVICE=laserjet -dBATCH -dNOPAUSE %s
The "%s" informs Geometer that the file name is to be inserted at this point in the command.
This is, of course, an extreme case. Your print command may be something as simple as:
print %s.