I'm sure this has been requested before so I'm simply re-iterating...
It would be nice to have a flip-flop feature to flip between the maps and approach plates (unless it is already there and I haven't figured it out). I recently completed another long crosscountry trip and it reminded me of the nuiscance problem. When I am on my final leg (maybe 50-100 mile out), I want to look at the approach plate (planning for an instrument landing). I find I have to search for it...once I get there and have reviewed the plate, I want to go back to the map. When I enter the approach phase of the flight, I simply would like to "switch" back to the approach plate without having to go back thru the menu. Sometimes, when I haven't quite reached the approach plate phase, I want to see the map again... Currently it is a PITA to flip back and forth between the two phases of flight.