I've noticed that on my iPhone 6+, whenever I look at a photo the Photos app zooms in until there are no black spaces on the sides, so the screen is completely full. I can see how some people like that, but for me it's infuriating. It means either a bit from the top/bottom or from the sides is out of view until I delicately pinch it in a little. However, if I swipe left or right and then go back, it is again zoomed in and I can't see everything. Does anyone have a solution to this?