Alpha

Allows you to apply an alpha value (transparency) to one or more tracks or one or more edits. You can use the slider or have maximum precision by entering numbers in the input box. You can use the Clear button to reset to the default value. Being also keyframable, it allows an excellent variety and possibility of use in the most disparate ways.

The CINELERRA-GG Community, 2021
https://www.cinelerra-gg.org