> So when i click a game to play the window that appears in the centre of the screen > (With the game running inside) will just look like a borderless or frameless square.
So you want the game full screen, but confined to a small square in the middle? That's an unusual use case, and I don't think it's possible.
On the other hand, if you just want the game to take up your full screen without windows or desktop or anything, -nowindow does that
|