Hi, Erik Richard,

As Ben Andrus said, a .txt extension normally represents a plain 
ASCII file with no formatting of any kine.

In my experience, if you open a .txt file, NWP will allow you to add 
formatting to the file, but the formatting is lost if you save and 
reopen it if you save it as a plain text file, as indicated in the 
Save dialog by File format: Plain text.  To retain the formatting, 
you must save it in RTF (Nisus native) or MS Word format.

It would be better if NWP displayed a warning when you attempt to 
save formatted text in plain text format.  I posted this as a feature 
request.  I took the liberty of naming you as a co-requester.
http://www.nisus.com/forum/viewtopic.php?f=18&t=3992
-- 

Bob Stern