The next step is to create a button to display when mousing over the existing button. Open the layer gallery and create a
new layer named MouseOver
Copy the existing button from the MouseOff layer and paste it in place on the MouseOver layer. (Ctrl + Shift +V to paste in
place) This will cause the button to be inserted within the MouseOver layer and positioned at the exact same X and Y
coordinates as the button within the MouseOff layer