Mouse Object -> Action -> Disable Mouse Input, Enable Mouse Input
Mouse Object -> Conditions -> MouseObjectEnabled?
Same with Touch, and Keyboard Object.
In my game I added support for a Mouse and for Touch screens. To test that touch works I enabled the (use mouse input) property, and disabled all conditions with the Mouse. After successful testing, I re-enabled all the mouse conditions and then disabled the touch(use mouse input) property, and exported the game, because this works I believe.. I dont have a touch screen device for development as of yet to test it. If doing development this way a Mouse->action->disable_mouse would help out, and speed up testing, I can also see it being used in other ways of development also.