Double tap as fast as you can (space key works too) If you want to change it to timed, press T on "Tap to Retry" If you want to change it back to regular, press R on "Tap to Retry" Should be around 45-80ms on mouse (I'm on touchpad) and 35-60ms for space I got 27ms for space bar and 32ms for touchpad/mouse/touchscreen (I play geometry dash)
