In the Backstage view, on the Account tab, you can set up your Office 2013 account the way you want it. First, you can change the Microsoft Account you’re using to sign in to Office 2013—and switch accounts if you like—and review your account settings and change your account photo. You can also find information about which Office 2013 installation you’re using.
With an Office 2013 app open on the screen, click the File tab to display the Backstage view.
Click the arrow to the right of your user name.
A list showing your profile information and giving you access to your account settings appears.
If you want to change your photo, click Change Photo and choose a new photo from your computer. ...