LG LG-X230DS - Touch Screen

Basic Functions 35
Touch screen
You can familiarise yourself with how to control your device by using
touch screen gestures.
Tapping
Lightly tap with your fingertip to select or run an app or option.
Tapping and holding
Tap and hold for several seconds to run a hidden function.
Double-tapping
Tap twice quickly to zoom in or out on a photo or map.