Zepir's map editor

i got the WCZmapedit thing, but how do you actually use it? i open up a map on zepirs and i want to apply some of that black boundary thing, how?

Why are you using that ancient editor?

Usually using Zepirs when your mapping has already begun is a bad idea... Anyway, there are a lot of old ancient tutorials for it out there. And Draco, it's still a good editor.