The welcome page shows the following instructions:
Real-estate is arguably a precious commodity. The instructions are a bit more wordy than perhaps necessary, but why not simply giving people a shortcut instead. For example:
Change your public username:
- Click the following link to change your public username:
Change Display Name
It may take several minutes to populate the update, but your new name should appear at your next login.
Changing the public username is probably something most people want to do, and should do, but not reading instructions, which will come when all else fails. Simplicity is king. People will notice they can click on their username, and see other options too.