7ef8676a_Photo_Editing_with_Aperture__Multi_Touch_trackpad_gestures
[Feature] Book Layout Editor [Multi-Touch trackpad gestures] 
Use the pinch gesture to zoom in to or out of the selected page or resize the object beneath the pointer on the page. (The Edit Layout button must be selected to resize objects on the page.) Use the rotate gesture to rotate objects. You can also hold down the Shift key as you use the rotate gesture to restrict rotation to 15-degree increments. Use the swipe gesture to change pages.
Photo Editing with Aperture
Multi-Touch trackpad gestures