Apple Motion 4 - Manual (Page 1266)

2 In the Toolbar, choose the Adjust Four Corner tool from the 2D transform tool set.
Adjust Four Corner tool
3 Drag each corner of the foreground element into the correct position.
Once a corner is dragged in the Canvas, the Four Corner checkbox is selected in the
Properties tab.
Tip: You may want to lower the opacity of the foreground object to better see the
reference points on the background clip. You may also want to disable snapping so the
image you are adjusting does not snap to the Canvas guidelines. To turn snapping on or
off, choose View > Snap or press N.
4 Go to the frame where you want to start the track and apply the Match Move behavior
to the foreground element.
1266 Chapter 19 Motion Tracking