How-to temporarily change the opacity of all objects on a specific layer?

I want to adjust the opacity of the objects on Layer A so they serve as a light background, and then trace over them on Layer B.

Is this possible?
If the objects on Layer A already have opacity settings, can I preserve and restore those settings?

A script would work too.

Shift + Ctrl + F10
This seems to work only on the selected object.

Correct answer Monika Gause

You can assign opacity to the layer as a whole. This will not affect the objects’ opacity, but act on top of it.

To do that, target the layer (click on the circle)

And then set up the opacity.

Legend

Thank you.
I’ve already found a way to watch it—it was really well done.

Community Expert

I’m glad you could solve your issue. I just included the video as an addition to understand the multiple ways of selecting.

Legend

Oh, YouTube again.
Why do they have to block it?
Sometimes I need it, but it’s blocked.
This is just wrong.

Correct answer

Community Expert

You can assign opacity to the layer as a whole. This will not affect the objects’ opacity, but act on top of it.

To do that, target the layer (click on the circle)

And then set up the opacity.

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