Apple Motion 3 - Manual (Page 1089)

Chapter 12 Using Shapes and Masks 1089
2 Choose a mask drawing tool (the Rectangle Mask tool, the Circle Mask tool, the
Freehand Mask tool, the Bezier Mask tool, or the B-Spline Mask tool).
Note: If you haven’t selected a layer, the mask tools are not available.
3 Begin drawing the shape you need in order to mask the layer.
For more information about how to draw and edit shapes, see “ Shape and Mask
Drawing Tools ” on page 999.
4 When you’re done, you can finish the mask by doing one of the following:
 Click the first point to close the mask.
 Press C to close the mask, joining the first point you created to the last.
 Double-click to close the mask, joining the first point you created to the last.
 Press Return to close the mask, joining the first point you created to the last.
 When using the Freehand Mask tool, join the end of the mask to the target circle at
the beginning of the mask. If you don’t reach the beginning of the mask, it is
automatically closed when you lift the stylus or release the mouse button.
Note: Unlike shapes, masks are always closed.