Apple Motion 4 - Manual (Page 1075)

• Adjust the Feather slider to soften the mask. Positive values spread the feathering
outward, while negative values feather the shape inward.
Original image
before masking
3 Touch the stylus on the tablet to begin drawing the mask in the Canvas (if using a mouse,
click in the Canvas, but don’t release the mouse button).
Continue drawing around the object you are masking. To close the mask, finish the line
at the mask’s starting point. A small circle will appear when the pointer is over the starting
point.
Note: If you don’t close the mask at its starting point, the mask is automatically closed
when you release the mouse button.
A small circle indicates
target to close mask.
The mask is completed.
4 Edit your control points to fine-tune the mask.
For more information on editing control points, see How to Edit Shapes .
1075 Chapter 17 Using Shapes, Masks, and Paint Strokes