Samsung NP940X5J-K01US - Manual (Page 51)

Basics
51
Pinching
To zoom in, spread two fingers apart on a website, map, or image.
Pinch to zoom out.
Gesture functions using three or more fingers on the
touchpad are not available.
Scrolling
To scroll up, down, left or right, swipe with two fingers on the
touchpad.
or