Double-tap to auto zoom in Mac OS X Lion

smart-zoom

One new multitouch gesture introduced in Mac OS X Lion is the two-fingers double-tap for Smart Zoom.¬†Borrow from iOS’s double-tap-to-zoom function, when you double-tap on the trackpad using two fingers, Lion will auto-zoom whichever element is under the pointer to fill the whole window. For example, double-tap with two fingers on the text you’re reading now will zoom in to enlarge the text column to fit the full window width. Double-tap again to zoom out.