Hi! Before saying anything else, I feel like mentioning I've searched for simmilar threads, but didn't find anything.
So, the sittation goes like this: I've bought a second monitor I want to use for chats/browsing/etc while using the other one for gaming, or something else. The new (and currently main monitor) is 1920x1080 , and the second one is 1680x1050. I've installed it, but after I did my stuff in the screen resolution thing , I've noticed the main monitor isn't showing the full image. It has a black border, I think it is set to 1680x1050, and that thing is to correct the missing space.