You can use keyboard shortcuts to accomplish this. Type them directly into the text box in Drupal. I've done this many times.
For Mac: option key + r = ®
http://www.nouilles.info/keyboard_shortcuts.html
Cheers,
Gary Broyhill
Web Developer
Office of Marketing & Communications
Lenoir-Rhyne University
LR.edu
(828)328-7379
@lenoirrhyne
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Message: 6
Date: Thu, 10 Mar 2011 16:27:19 -0600
Subject: [support] Special characters in menus
No Google luck on this one.
Drupal 6 here
Is it possible to use special characters in the menu link title and page
title?
"Great Energy® Home" is displayed exactly like this instead of with ®
replaced by the registered trademark symbol.
TIA
*
Ryan LeTulle*