In the Node or Timeline view, select the Animated Matte Generator node.
Display the controls of the Animated Matte Generator node by doing one of the following:
In the Camera view toolbar, click on Show Control .
From the top menu, select View > Show > Control.
Press Shift + F11.
The control points for the Animated Matte Generator display in the Camera view.
In the Tools toolbar, select the Transform tool to be able to manipulate the matte controls in the Camera view.
In the Tool Properties view, you can enable Control Selection Mode to enable selecting several control points in the Camera view by drawing a lasso or marquee around them with the Transform tool. This can make animating the control points of the Animated Matte Generator easier.