I’ve just added some KML images and they appear fine on my map. What I’m wanting to do is give people the option to turn the KML layer on and off from Google Maps – just like you do with the other map controls. What we want to do is have the ability to overlay some old aerial imagery from 1943 over the current day Google Maps imagery so people can compare what an area looked like then and now. At the moment is one or the other. Is there a way with CSS or something else to add that functionality to the Google Map?