Author Box
Edit your User profile first by going to the admin page (Dashboard) > Users > All Users.
Edit the user.
Fill in your Biography info and to change the gravatar, you have to connect your WordPress blog with Gravatar (free). Save.

Edit your User profile first by going to the admin page (Dashboard) > Users > All Users.
Edit the user.
Fill in your Biography info and to change the gravatar, you have to connect your WordPress blog with Gravatar (free). Save.