Is it possible to display an image and on top of that image have a button (preferably using GUIDE). The reason is that I have a GUI that controls a stage for a microscope. I want to have buttons to act as a joystick i.e. up, down, left and right. Ideally I would like to have a button that is shaped like an arrow but this is not possible, so the next best thing is to have an image of an arrow, and place the button inside it.