LG K4 2017 Mode D'emploi page 22

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.
Swiping
Tap and hold an item, such as an app or widget, then swipe it to another
location. You can use this gesture to move an item.
Basic Functions 21