Steve,
Once you open the Edit Details page, just under the top section is another one called Custom Details or something like that. It will show what you now have under your name and just below that is an open box that you can type in a name or saying that you want under your name and to the right hand side of it is a button that says Default I believe. I am going to go look in mine right now and will post the exact way it is.
Here is a snap of my CP and that section.
Ron