Samsung SM-P905VZKAVZW - Manual (Page 22)

Understanding Your Device 16
Double-Tapping
Double-tap on a web page, map, or image to zoom in a part.
Double-tap again to zoom out again.
Swipe
Swipe left or right on the Home screen or the Applications
screen to see another panel. Swipe up or down to scroll
through a web page or a list, such as contacts.