Hi KenKris,
I think I see where your getting those references; the ? to left of the Description section for HELP. Those are unfortunately dated (language) to time before this revision of the one-page lister. Programmers just hate to write documentation.
The Item Description NOW has a simple/Standard mode (default) or an HTML mode, which you should be able to toggle back and forth between. You can also launch (pop-up window) the Full Size Editor and it also has identical Standard and HTML modes. Both modes and the Full-Size feature are very useful when you've got a complicated listing with alot of embedded pics and sections.
If you are unable to launch the Full Size Editor, it may be due to setting on your browser that's blocking. Not being able to toggle between Standard and HTML is a problem, and that I don't have an answer for.
What's your OS (eg. XP) and browser (eg. IE 7)?
Dan