AutoCAD “Layers” should be called Collections, or Bundles. They are a way of grouping objects (lines, blocks, text, whatever you like) together so you may easily adjust properties they share.
I wanted a full-screen shortcut like Internet Exploder, Firefox and other web browsers, just for having a good look at a drawing on the whole screen with no distractions.
The Cleanscreen command is a good start but it didn’t go far enough for me, so I hacked it and added a few things to it. Now my full-screen has only the Top window bar with the quick-access menu and nothing else.