ZOOM (or ZOOM out) - when a joystick button is pressed the related axis response is divided by a choose number, reducing the in game movement, can be useful for precise set a laser over target to lock.
STOP - when a button is pressed the axis stop to respond to joystick handle movement and retain the last position, the idea maybe is useful for helicopter trim (Ka-50 Black Shark). There a issue when the button is released the axis cursor will jump for the actual joystick handle position...
