Ok, I got it to work last night and now it won’t work today. DRIVING ME CRAZY. Here’s what I’m doing:
Take an object of a two object scene and place it into the second layer. Then I go to the layer tab next to the camera and assign a scene layer that has the main object and assign another layer to the second object. Then I render before opening the compositor. Once that compositor is open => shift a to open a layer. But that option is not available. When I did this yesterday the problem was that I didn’t have “use nodes” selected. I have that selected now but I still can’t add any layers.
Hope I explained it right.