Hotkey to disable additional screens?

I have 2 screens, one large one for most my work, with a smaller one for when I am working with files and need to be changing windows a lot, it gives me somewhere to put them. However with my current graphics card, rendering 2 screens at once causes a notable fps drop when one screen is displaying a game and the other some part of my desktop. Is there a way I could create a hotkey to disable the second screen? (or a pre-existing one in windows or nvidia gpu drivers).

Thanks

Oh, didn't realise that could do that. Thanks :)