X

Softness slider, hold down the Command key.
10. To view the color mask alpha channel, click View Masks (next
to the effect name).
The mask’s alpha channel appears in the Viewer. White
indicates fully opaque mask areas, black indicates areas
outside the mask, and levels of gray indicate transparent mask
areas.
Combine multiple masks on a video effect
When defining the area of a clip effect, including a color
correction, you may find that it’s impossible to create the mask
shape you need using only one mask. For example, when masking
a shape with a hole in it, you need at least two masks—one set to
Add to mask the overall object, and a second set to Subtract to
cut out the hole.
You can set masks to interact in different ways using mask blend