As part of your account, you will have a Rindle profile.  To locate your profile, select your Account icon from the lower left column. 

In the Account area, the navigation bar will look different, depending on what level of permissions you have.  Unless you are an administrator or a billing administrator, you will not have access to Billing, Members, or Groups. 

In the Profile section, you can update your profile picture, or simply choose from one of the basic colors.  You can also modify your First, Last, and Username (used for @mentions).

You can change your Username at any time. A general rule of thumb is that they may contain letters, numbers, hyphens (-), periods (.), and underscores (_). Usernames must begin with a letter or a number.

If you would like to modify your email, you must contact your the Owner or Administrator to do so.