I guess im confused. I'm used to photoshop and sketchup. In the file I'm working on now, I have a layer for the stage, senic elemnts, lights, and text, and dimensions.
When I extrude and try to fly over in 3d, the current layer goes to 3d, but the others stay in 2d. I'm using classes a lot like CSS for websites, but I think I saw a option to hide them, or gray them. I use layers to hide stuff.
What are the general rules with layers and classes?