Hi,
one from outputs from this discussionwas[mention:d94b5554fac345ceb791422997d99122:e9ed411860ed4f2ba0265705b8793d05]' finding that "level delete all" key-in can be used to delete all unused levels in active design file.
Because it's bug and wrong UX design, I created this idea to remove this key-in.
The idea justification

There is no such key-in described in MicroStation help file (I was not able to find any occurence), so it seems to be not "official key-in".
The key-in is not unambiguous, because when a level named "all" does not exists, all levels are deleted, but when the exists, only this level is deleted. So when there will be a script to delete a level "all" and from any reason such level will not exist in a file, all levels will be deleted instead of it.

A key-in "level delete *" can be used to delete all levels and because * cannot be used in a name level, there is no problem with the change with level name.
With regards,
Jan