Subscript shortcut?

Giganews Newsgroups
Subject: Subscript shortcut?
Posted by:  Neight
Date: Fri, 2 Jun 2006

Is there a shortcut key to switch to subscript and switch back while typing?
It's a pain to have to highlight just a couple of charactors in each of the
multiple cells I have to have a subscript in. Can I assign a shortcut key?