I would like to modify the option "fonts designed for 640x480" ("don't scale up fonts" in earlier versions) at runtime. From earlier conversation, I believe that SetGameOption() should be able to do that, although the parameter required for that is not defined nor listed in the manual; so instead of SetGameOption(GO_UPSCALE,1) I'd have to use SetGameOption(9999,1) where 9999 is some number. Can someone tell me how to do this please?