Asus R403C User Manual page 51

Rotating - Rotating images clockwise/counterclockwise is done on
the touchpad using the pinch gesture.
Put two fingers on the touchpad then turn in a circular motion, either
clockwise or counterclockwise, to rotate an image.
Scrolling - Using two fingers on the touchpad, you can scroll through
lists vertically and horizontally.
To enable continuous scrolling, hold your fingers on the edge of the
touchpad when moving from up to down/left to right and vice versa.
The mouse pointer changes to a double-headed arrow pointer when
continuous scrolling is activated.
Zooming - Using two fingers on the touchpad, you can enlarge or
reduce the view size of your selected image.
Spread apart/bring together two fingers to zoom in/out.
Notebook PC User Manual 51