custom resolution

I'm using a wide monitor and once I tried to play the game using 3440x1440 px. resolution, I only have a tiny screen in the center of my screen and black borders. How do I setup my settings to play on wide screen without borders, low quality picture etc?

Hey guys, long time Mb2 player here since around 2004. For some reason, if I set my resolution to 3840x2160 (4K) the game does not scale properly and is extremely zoomed in, which makes navigating the menu impossible. (Imagine opening a 4K image on an 800x600 display) It works at 1080p and...