I just installed Debian (again) and had to look around again to find out how to stop using 100dpi fonts, which are too big for my liking. I finally found a thread on Google Groups that mentioned the files to change.
This default can be modified by editing the following conffiles:
xdm /etc/X11/xdm/Xservers (see xdm(1)) xfs /etc/X11/fs/config (see xfs(1)) xinit /etc/X11/xinit/xserverrc (see xinit(1))</blockquote>
Ah, much better.