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678Final Cut Pro User Guide
6. Do one of the following:
• View the alpha channel in black and white: Click the View Masks pop-up menu and
choose Black and White.
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.
• View the visible areas of the masked image in color: Click the View Masks pop-up
menu and choose Color.
The colors inside the mask appear in the viewer. Gray indicates areas outside the
mask.
To turn the current mask view on or off and switch between displaying the mask and the
adjusted image in the viewer, click View Masks.
Add a shape mask in Final Cut Pro
A shape mask defines an area in the image so that you can apply color corrections either
inside or outside that area. For example, you might want to emphasize an object in a shot
by darkening the area around the object.