There’s some interesting stuff buried within the depths of the Mac OS X file structure. Among these, according to MyAppleGuide, is a bit of code in Mac OS X’s Trackpad preference panethat would allow users of multitouch-capable trackpads such as those on the new MacBooks and MacBook Pros to define their own four-finger gestures.
The file is currently a .nib, meaning it’s currently just installed as part of the interface and no actual code is hooked up to it, but if you have a multitouch-capable Mac (such as a unibody MacBook, MacBook Pro or MacBook Air), you can find the same file at /System/Library/PreferencePanes/Trackpad.prefPane/Contents/Resources/ English.lproj/FourFingerSwipeGesture.nib.
Currently, the multitouch trackpad’s four-finger gestures are hard-coded and perform a given set of functions such as activating the desktop, triggering Expose, and bringing up the Application Switcher.
Customization of gestures could be en route in a future Mac OS X update, a feature many users might appreciate.
Stay tuned for additional details as they become available and let us know what you think in the comments or forums.

There’s some interesting stuff buried within the depths of the Mac OS X file structure. Among these, according to MyAppleGuide, is a bit of code in Mac OS X’s Trackpad preference panethat would allow users of multitouch-capable trackpads such as those on the new MacBooks and MacBook Pros to define their own four-finger gestures.
The file is currently a .nib, meaning it’s currently just installed as part of the interface and no actual code is hooked up to it, but if you have a multitouch-capable Mac (such as a unibody MacBook, MacBook Pro or MacBook Air), you can find the same file at /System/Library/PreferencePanes/Trackpad.prefPane/Contents/Resources/ English.lproj/FourFingerSwipeGesture.nib.
Currently, the multitouch trackpad’s four-finger gestures are hard-coded and perform a given set of functions such as activating the desktop, triggering Expose, and bringing up the Application Switcher.
Customization of gestures could be en route in a future Mac OS X update, a feature many users might appreciate.
Stay tuned for additional details as they become available and let us know what you think in the comments or forums.