Show opacity level under every layer in the timeline

Yes you're right.

but graph editor is so huge and it shows only 1layer at the time.

or it's not super clear what curse drives what layer.

Ah, got it! Thank you for the clarification. You can see something like this in the Graph Editor, but not over the layer bars themselves.

Thanks again,

- John, After Effects Engineering Team 

Ho yeah I know that of course. B¬)
You can see the % in blue or red on the left side in the layer stack at the cursor time.

But I am think about something quicker then that in the timeline.
I imagine a curved level of the opacity on each layer.
Kind of a graph editor right in the color.
So we could see the evolution of the opacity of every layer independently of the cursor position.

Audition is doing something like that with the audio level of a layer in multitrack session.

Hi @olivierbe,

Thanks for making this request. Currently, you can view the Opacity for each layer in the Timeline by pressing the T key (as in "opaciTy") without any layers selected. If you have some layers selected, this will reveal the Opacity for only the selected layer(s). Does this help with your need, or are you looking for something different?

Thanks for any additional info,

- John, After Effects Engineering Team