My mouse lags if I don't have it in windowed mode so I chose the fullscreen windowed mode in the f1_resdll file but it looks like it's 1024x768 instead of 640x480. I would like the original resolution because the words are pretty small but I can't change the resolution with the windowed fullscreen enabled. I can change it but it doesn't seem to stick. Idk what's going on. Windows 10.
In the video options, deselect the Scaling x2 option. Once done under Fullscreen all resolutions will appear up to the lowest 640x480.
However, I advise you to keep the resolution 1024x768, and in the Panel Scaling, for all the voices, except "Movies", select "FILL", so as to adapt the image to your monitor.
Do not do this for "Movies" or the videos will be seen incorrectly.
I Forg, however, some areas of Fallout 2 will be seen with black borders, because the default map is small. For the rest you will see, you will see perfectly!