The Armoury Crate app is meant to solve this problem, but it often failed. A button to the left of the screen brings up an overlay that, among other things, lets you swap between Gamepad, Desktop, or Auto modes. However, in 20-plus hours of testing over the past week, I often found that games thought I was using a keyboard when I was in Gamepad mode. Once a game figured out what control method I was using, it worked well enough, but I started assuming that it would take time to figure out how to control each new game I played.