Screen to large will not return to normal size
Screen wil not shrink
iPad (4th gen) Wi-Fi, iOS 7.0.4
Try this - Reset the iPad by holding down on the Sleep and Home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider - let go of the buttons. (This is equivalent to rebooting your computer.) No data/files will be erased.
Cheers, Tom 😉