You can change the role of a team member if you are assigned the Manager role for the project.
To change the role of a team member:
1. Navigate to your project either from Quick Links widget, or click Projects and double-click the project row from the list.
2. Roll over the Project name in the breadcrumb, and click Team Member.
3. From the Team Member List view, double-click the role for the team member, and then select from the list.
4. Click Save.