How do I set the active layer in SketchUp web free?

How do I set the active layer in SektchUp web free? I see how to create a new layer. I created 2 new layers and somehow I made one of them the active layer. How do I change the active layer back to Layer0? I read online about using the radio buttons, but that appears to apply to the installed version, not the web version I’m using.

the pencil…

john