What hidden characters are you trying to remove?
Are you looking for View -> Structure -> Hide Tag Markers?
Thanks Joel - I don't mind hidden characters, but
@ Peter, the characters that noted my Data Fields...
They were going to be bothersome to me, for no good reason.
This file will be editted possibly hundreds of times in the future, and I just don't understand them
Daniel, those don't look like Data Merge field markers, but more like XML fields, as Joel noted. I don't think you can remove them without destroying the data, but you can hide them.