The genesis of multi-touch on Mac OS X was the ability to perform two finger scrolling on a trackpad. The technology was further refined on mobile touch screen devices such as the iPod Touch, iPhone, and iPad. And it has also matured on the Mac OS X platform to allow the use of multi-touch or magic trackpad combined with one or more fingers and a motion to interact with the computer. Gestures are intuitive and allow us to control what is on the screen with fluid motions. Some of the things that we can do using multi-touch are as follows:
Two finger scrolling: This is done by placing two fingers on the trackpad and dragging in a line
Tap or pinch to zoom: This is done by tapping once with a single finger, or by placing two fingers on the trackpad and dragging them closer to each other
Swipe to navigate: This is done by placing one or more fingers on the trackpad and quickly dragging in any direction followed by lifting all the fingers
Rotate: This is done by placing...