Why is the type on the x3270 menus so small?

Question
Why is the type on the x3270 menus so small?

Answer
Probably because you should be using x3270a.

x3270 uses a very old UI toolkit that doesn't automatically adjust for higher-resolution displays. There is explicit code in x3270 to adjust the sizes of visual elements, but this does not work for fonts. (This logic was added in x3270 4.0.)

The x3270a script takes care of this problem, by computing new font definitions based on the display resolution, then running x3270.