How do I specify the fonts I want to use?

[Steve Drach]

For the standard display, not reports?  You may remember I had a  
problem running GC last week and folks recommended I upgrade.   
Updating fink packages solved the problem.  Then I upgraded Xquartz  
and now I have a different font, that while pleasant enough is too big  
for me.  So how do I change it?

GC 2.2.9, Mac OS/X 10.5.6, XQuartz 2.3.2