Enlarging images

Hello everyone.

I was hoping that someone could provide some insight as to how one can have 5 separate images on a "select one" quiz slide and go from a normal view of each image to an individual enlarged view when directed.

I am looking to do this in a way so that the enlarged view of the image covers all of the other normal view images. My main issue is that when I create the state which has the enlarged version, I cannot get the other images to either disappear or to be covered by the enlarged version. Please help.

Thank-you.