The renderTable resource specifies the style of text characters in the title area, menus, and icon labels. The default font is called fixed, a fixed-width font that does not make adjustments for a particular character's size and shape. The fonts available on your system are usually listed in directories under /usr/lib/X11/fonts. You can set the renderTable resource to any basename of a font listed in the font directories.
You can specify a font for all mwm components by using the following syntax:
Mwm*renderTable: font_name
You can specify a font for a particular mwm component (menu, icon, or client) by using the following syntax:
Mwm*menu*renderTable: font_name
Remember that the size of the font affects the size of the client window frames, icons, and menus. The fonts used by applications managed by mwm are not affected when you set the renderTable resource.