Certain child theme demos exhibit an Author Box that appears after the post content and before comments on single posts.
To incorporate an author box in your articles, navigate to Users > Your Profile, and locate the About the User segment. Input your information into the Biographical Info section. The text and HTML employed in the demo are presented below.
For your profile picture (gravatar) to appear on your profile screen or in your Author Box, you need to have an account at http://gravatar.com with a pre-uploaded image.
Don’t forget to click the “Update Profile” button at the bottom of the screen (which is not visible in this image) to save your changes and update your profile settings.