Like Safari and most other Apple-made applications in OS X, Apple has built gestures into Finder. I must admit I just discovered this recently by accident on my MacBook Air. Here are a few of the gestures I’ve found work with Finder, if you discover more feel free to post them in a comment below.
Three Finger Swipe: Back/Forward to move back/forward through directories (much like Safari and browsing history). If you’re in Quick Look this will move you to the next page in a multipage document (up and down three fingered swipes also work for Quick Look). Two Finger Zoom: Again, a Cover Flow trick, this will toggle the full screen preview (in to enter full screen, out to exit).It is nice to see that Apple has built gestures into one (if not the most) used application on the Mac: Finder. Once I’ve used the swipe to go back through Finder’s history on my MacBook Air, it feels a little weird doing it on a Mac Pro via the mouse (can anybody say wireless trackpad/keyboard combo for desktops?). The other thing this makes me wish I could do is use the Three Finger Swipe vertically to navigate the directory hierarchy.

