I'm thinking of getting a Nook HD+ for storing and viewing my photos. Could somebody please let me know what the actual size of the photos would be on screen. I estimate it would be about 7x5 inches, is that right? Also, is the whole screen available to use or are there bars across the top and bottom for notifications etc. I use the 'Quickpic' app on my phone for photos and would expect to use this on the Nook.