If you want to change a user's role in a project, you can follow these steps to do it.
1. Go to Manage tab and then click Manage Projects (Figure 1)
2. Click number link under Active User column associated with target project. It will go to Active Users page of selected project (Figure 2).
3. You can see a list of the users in the project with their roles. You can simply set the new role for the target user(s), then click Save Changes button (Figure 3).
4. The page will refresh and the role of the user(s) will be updated (Figure 4).