But there's more.
Using TOOLS.CDE (you need to load it manually or automatically), you can find a set of cool tools.
The Level family includes toggle display, display all, display none and some more very cool commands.
While on this subject, one of the functions there is another fill to what we currently lacked - that's the IMPORT command which lets you import level lists from other files. (Kubotek put the export but forgot the import)