Which (of many) maps is the 5X using??

I'm new to the 5X. It came with a bunch of maps installed. All of which appear to be turned on. So, when you zoom in on an area how do you know or chose which map is being used? For example, if both the topo and street map cover the same area how do you route on trails on the topo map? Do you have to turn the others off? I am confused about how the multiple maps of the same area are handled.