To access the Manage Account page, click on the profile icon in the top right of the navigation bar, and then select your user name. This will bring you to your account page. On this page you will see at the top your Role memberships. This lists all roles assigned to you. Below that you can update your profile. You may change your display name as well as your biography. Once you update click save, and you will see a green saved message at the top of the page.