When you activate the sensors in your device, you can control certain functions by turning the device.
Select Menu > Settings and Phone > Sensor settings.
Select from the following:
Sensors - Activate the sensors.
Turning control - Select Silencing calls and Snoozing alarms to mute calls and snooze alarms by turning your device so that the display faces down. Select Auto-rotate display to rotate the display content automatically when you turn the device on its left side or back to a vertical position. Some applications and features may not support rotating the display content.