I was having trouble getting the fade in and out tools to work. They usually do, but not today. I came here for help. Someone suggested moving the Composite Envelope down and out of the way. It worked great... once I figured out what the Composite Envelope was. I'm a long-time user, but I don't always have the right terminology. I don't work with other users, nor do I communicate with them, so to me, it's that blue line at the top of the video track that moves the video between 0% and 100%... the fader or dimmer, in my mind.
I'd like to respectfully suggest that when certain terms are used, they are defined as well.
Thanks for the help, and for considering my suggestion.