How to lock the rotation on an iPad

First, switch the switch on the top right of your iPad. If a bell appears, then undo the switch. Otherwise, your screen is locked. Undo the switch if you need to unlock it. If the bell appeared, double-click the home button (button at the bottom of the iPad) and swipe from left to right on the small menu that appears. Tap the button in the bottom left corner and your screen rotation is locked! This should be handy in certain situations.