Once I knew it was a "paragraph" icon, I was able to experiment by turning toolbars on and off.
Once I got a toolbar that showed the ¶, it wouldn't illuminate, so I couldn't switch it off.
However, once I highlighted everything in the email, it illuminated... I switched it off, and now I have my email back to normal again.
I really don't know where I'd be without the help I've received here.
Many thanks to all for the assistance
