Apple Magic Trackpad
28.07.10
Sharp-eyed Mac users will note that Apple did produce a keyboard with a detachable trackpad for the Twentieth Anniversary Mac in 1997. That trackpad was a wired model with a physical mouse button, and of course the technology of the time did not support multi-touch. The Twentieth Anniversary Mac's initial list price of $7,499 meant that very few were seen out in the real world (Jerry Seinfeld had one on his eponymous show).
The bottom of the Magic Trackpad is standard Apple white plastic, but the notable features are the rest pegs on the bottom of the unit. At first glance, they resemble standard feet to keep the trackpad from moving around the desktop. The feet are actually the mouse buttons for the trackpad. When you put a little pressure on the top of the Trackpad surface, you hear and feel a reassuring click, just like on the MacBook trackpads.
Using the Magic Trackpad
Like the trackpads on the MacBooks, the Magic Trackpad supports up to four simultaneous multitouch points. You can use one finger to click and drag. Two fingers have the most functions: scroll, rotate, pinch/open zoom, and secondary tap (right-click) are all two-finger options. Three fingers allow you to swipe back/forward in programs like Safari , iPhoto , and Preview, Apple's built-in photo/jpeg viewer. Last, but not least, four fingers let you swipe left/right to bring up the application switcher, and four fingers up (show desktop) and down (show all windows) activate Exposé, a feature in Mac OS X that allows for quick navigation.
Source: PC Magazine