Changing Sugar system font?

[Wilhelm Fitzpatrick]

I've begun to experiment with OPLC images under VMware and Qemu.  So  
far, with all the images I've tried, (546, 609, 613), the system font  
being used in Sugar is insanely small, to the point of near  
unreadability.

Via googling, I was able to find a hint on how to change the  
developer console font size, but so far I've not been able to figure  
out where I can influence the font that is used throughout the GUI.   
Can anybody give me a pointer as to where to look?

I apologize in advance if this is not the right list for such  
questions (although if it isn't, I'd appreciate being directed to the  
correct one).

-wilhelm