Noticed that typing was replacing text and could not find the
reason or mention in the FAQ on how to fix it.
The fix, open a new message, on the format menu [show all menus
first step] then under Format, select Encoding, Western European
Windows, ISO is the default and the typing replaces text.
Suggest that searching for Help with typing as a keyword should
point to this fix.
typing replaces text-fix 
Linear Mode
