copy level?

Hi all.

If a level is for all models, I don´t understand why in the help guide about Level Manager, it says:

Edit > Cut  Removes the selected (highlighted) level from the model and copies it to the clipboard.

Edit > Paste Pastes the levels in the clipboard into the active model.

Why it says: active model? if a level is for all models?

Why Level Manager has cut/copy/paste operations for levels? I don´t understand.

Thanks.