Asus VT168HR 15.6" Multi-Touch Monitor - Manual (Page 17)

3-3 ASUS LCD Monitor VT168HR
Zoom out
Bring together your two fingers on the touch panel.
Zoom in
Spread apart your two fingers on the touch panel.
Single Tap/Double tap
Single Tap
Touch the target on the screen with one fingertip for one quick tap, then
release.