found a reference to make changes in this config file.

1 - swap 2 lines in the font path, called "catalogue"
/usr/X11R6/lib/X11/fonts/75dpi:unscaled
/usr/X11R6/lib/X11/fonts/100dpi:unscaled

Had 75dpi first, now has 100dpi first.

2 - change default-resolutions, was
default-resolutions = 75,75,100,100
is now
default-resolutions = 100,100,75,75

I made those changes, but they didn't appear to work(logged out then back in) and then tried changed the default-point-size from 120 to 240.

I guess log out/in didn't restart the X server. Shut down the system to go out for dinner, and when we came back the fonts are now bigger. They don't look twice as big, so I don't think the default-point-size change is what made it bigger.