Baseline (Widescreen) Solution & Issues
Fullscreen mode is limited to 640x480 with no way of changing it. Fullscreen mode is doubled 320x240 by default; a full 640x480 mode can be used by toggling fullscreen with Shift+F4 instead of F4.
The game windowed can be resized but has a maximum size limit with a play area of 700x524 (the largest HUD width in DASHRES.DLL).
Ultra/Super-Wide (21:9/32:9) Specific Solution & Issues
Eyefinity / Surround Specific Solution & Issues
4k UHD Specific Solution & Issues