Tap a button to bind it · hold any button to cancel ·
push the stick to skip a prompt.
Two actions may share a button only if one is used on the ball and the other
off it — the through ball and the slide do by default. Anything else would fire
together. Only needed for a controller the browser does not recognise; in X-input mode
most pads need none of this. Kept on this machine, against this controller.