Displaying formatting marks

[TedMi]

I see lots of chatter on this NG about hiding formatting marks, but I have
the opposite problem - how to display them, and making the display stick!
Outlook 2007 SP2 on Vista. Office button, Editor Options, Display turns on
selected formatting marks for that display session only. When I close and
reopen the message, formatting marks do not display and the command sequence
must be repeated. How do I make this setting stick, like it does in Word?

Thanks.
-TedMi