Make a layer current — for sure

Jack Foster contributed a menu item that makes sure a layer is on, thawed, unlocked and exists — in other words, that you can use it. He says, “When working on a drawing that other users have worked on, you may find that the layer you need is off or frozen. Even if the layer doesn’t exist, this routine will create it. His example is for a layer named “pipe.”

Here it is:

^c^c-layer;on;pipe;thaw;pipe;unlock;pipe;make;pipe;;