Working with masks and mattes
- View mask paths
- Select masks, segments, and vertices
- Change a mask path numerically
- Lock or unlock masks
- Copy, cut, save, reuse, and delete masks
- Control mask path color
- Mask modes
- Adjust the edges of a mask
- Adjust mask feather
- About track mattes and traveling mattes
- Convert a layer into a track matte
- Preserve underlying transparency during compositing