Stop automatic rotation

Prevent screen from rotating

Open quick settings and turn Auto-rotate off.

In this mode, you can manually rotate the current app. Touch by the navigation buttons.

Allow screen to rotate

To allow rotation for all apps, open quick settings and turn Auto-rotate on.

You can also adjust this in Settings > Display > Advanced > Auto-rotate screen

TipIf your home screen isn't rotating but Auto-rotate is on, then check your home screen settings. Touch & hold a blank spot on your home screen, then touch Home settings > Allow Home screen rotation.