How to Get Your Screen to Flip Sideways on the iPad
iPad users enjoy the ability to freely turn and flip the device, which responds by reorienting the content on the screen. This is handy when you want to look at content from another direction or change how you are holding the device. The device will automatically turn the content so you do not have to kink your head to view it if you have the right setting and the right touch.
Tap the "Settings" icon on the main screen of the iPad.
Tap "General" on the left side of the screen. Press "Lock Rotation" under "Use Side Switch to." Press your home button.
Slide the side switch to the down position. This will unlock the screen so it rotates.
Turn the iPad horizontally or vertically, depending on what you want.