https://www.macrumors.com/2009/02/13/customizable-4-finger-gestures-planned-by-apple/
Customizable 4-Finger Multi-Touch Gestures Planned by Apple - MacRumors
MyAppleGuide discovered an unused preference pane in the version of Mac OS X Leopard that ships with Apple's new unibody MacBook Pros. The preference pane...
multi touch gestures4 fingerby applecustomizableplanned