I sometime use external images for guides for text, movement patterns, colors, etc...

and being able to change the opacity for tracks helps me work without having to hide the track
then check back to see if I am following the guides right. I can keep the guides visible while
working on another track.

We are considering making tracks automatically composite and then it would definitely make sense to have track opacity.

thanks for the update.

If you decide to make the tracks composite by default will it be using the same
composite transition and maintain compatibility?

I would appreciate auto track composites. I love Kdenlive and have learned to work with it as-is, but this would save time and be much more intuitive. Also, bravo on the improvements in the last few months. It is amazing.

I vote for this feature :)