I am wondering how people change their screen resolution, and can you use 2 key's for playing? and what is it?! I want to use 2 keys but don't have an idea if you 'Need' a Mechanical keyboard or not. Or if you can just purchase a 2 key thing and use that. Why do people change their screen resolution and do they do it just for osu? and why do they change the osu resolution when they have already changed their screen res? thanks.