Event editing: Invisible NPC like in Narshe?

Thanks for the quick reply, madsiur! Oh, I didn't even know about another version of the level editor, so far I've been using the "normal" FF6LE Rogue. Would this expansion affect any compatibility with FF3usMe? Because I'm pretty sure I'll still need that one in the future.

Hm, I'll try again with the location name, maybe I just didn't save it properly or something. Or maybe some of the unused maps can't display it at all? Just to make sure, are all of the following maps really unused in the game?

2D, 2E, 4F, 63, 76, 7A, C7, DE, DF, E0, E3, E4, E5, E6, 101, 109, 113,11E, 14D, 17B, 183, 184, 193, 19E

They aren't named except for an underscore ____ most of the time, and I also checked that none of them contain any exits or events, so I assumed they were all good to use...