If you want to change the display name, navigate to wp-admin -> Users -> edit admin and change the “Display name publicly as” option. That entire page will give you a bunch of different options on how to display the user name.
If you want to actually change the user name, I believe you’ll need to do some database editing on the “users” table. Of course, if you’re not familiar with editing the database, you shouldn’t do this to prevent installation corruption.
Someone may know of a less hacky way to do it.
Roy
(@gangleri)
Alternally, you can make a new user, make it admin, log out and log in as the new user and delete “admin”.
To use the “Display name publicly as” option you may need to enter a nickname? Then just select that as an alternative to the ‘admin’.
