If you are using a WYSIWYG editor worth it's salt (JCE or WYSIWYGPro), you should see an icon/button called simply "HTML". Clicking on it pops up a window where the contents of the textbox are displayed in HTML form.
If you are using JCE, you will also see a link just above and to the left of the textbox to turn off the WYSIWYG editor.
OK, you are referring to links in the copy. I do have JCE installed and agreed that is no problem.
Sorry I should have explained myself better.
How about Links in the User Menu or main menu, ones you set in Joomla for main categories ?
I have a main menu item for contact us I want to no follow.
It's also a SEO technique for preventing pagerank distributing to pages with no content.
The basics are that every page distributes pagerank to other pages through links. The more links you have the less page rank flows to your other pages or indeed off sight pages. Therefore by no following pages you don't want page rank for you increase the benefit to others.
That said is there any way in joomla in adding it to your main links ?