I've had my S4 for two days and this morning I've been having a problem. Whilst viewing photos in the picture gallery, after a few seconds the menu bar at the top of the screen and the photo cascade at the bottom would disappear, leaving the photo to be viewed in fullscreen. This would happen in portrait and landscape. Now these bars are staying put and not disappearing so I can't enjoy seeing my photos in full. I've looked at the gallery app settings but don't see a way to change this. Thanks