Samsung SPH-L720ZKASPR - Manual (Page 28)

Rotate
For most screens, you can automatically change the screen orientation from portrait to
landscape by turning the phone sideways. When entering text, you can turn the phone sideways
to bring up a bigger keyboard.
Note: You can control screen rotation with the Auto-rotate screen setting. To make this
selection, press and then tap > Settings > My Device > Display > Auto-rotate
screen. See Auto-rotate screen for more information.
Phone Basics 16