It seems you can also map touch gestures to functions.
Simple scrolling with up and down finger swipe would be:
Button 3 is swipe up, 4 – down, 5 – left, 6 – right.
Pinch/zoom is 7 and unzoom is 8.
Long click is button 9.
Functions scroll-forw, scroll-back second argument may be page, halfpage or line.