Oh I wish I knew !! The pre loaded US map displays even thou there's no check mark in the "map info" for it to load. I can zoom in and locate the Everglades area but I can't tell if it's from the US map or the Florida map that I loaded. Do I have to zoom into the US map to get to the loaded Florida map ? I had expected the Florida topo to display as a separate map. Can the Florida map be layered under the US map ? If this is the case is there any way to get just the Florida map to display by itself ? I sure appreciate your help.