Asus VT229 Series User Manual page 15

Finger slide (on Windows 7/8/8.1/10 only)
Slide your finger to scroll up and down and slide your finger to pan the
screen left or right.
Zoom out
Bring together your two fingers on the touch panel.
Zoom in
Spread apart your two fingers on the touch panel.
3-2
Chapter 3: Touch operation