Switched from the 4S to the 6 just a couple weeks ago. One thing I notice and it may just be in some sort of setting. When I take pictures in landscape mode and when I view them, they don't fill the whole screen. I`m not using "square" for my photos and HDR is on auto. Just thinking the pic should fill the screen as I am previewing it. Doesn't seem to fill the screen if I take one in portrait mode either. Is this normal?