Handles are used to change the size of the object. To expand an object, just click a handle and drag it away from the center of the object. To shrink an object, drag a handle toward its center. The object's size will change as you drag the mouse. If an object has a fixed aspect ratio, changing one dimension automatically changes the other. If an object has a free aspect ratio, you can change one dimension (e.g., height) without affecting the other (e.g., width). Some objects have a property setting that determines whether the aspect ratio is fixed or free.