LG V20 User Manual page 42

Double-tapping
Tap twice quickly to zoom in or out on a web page or map.
Dragging
Touch an item, such as an app or widget, then move your finger to another
location in a controlled motion. You can use this gesture to move an item.
Swiping
Touch the screen with your finger and move it quickly without pausing.
You can use this gesture to scroll through a list, a web page, photos,
screens, and more.
Basic Functions
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