...
- Go to your Project.
- Click the action drop-down
of the project and navigate to Settings and then click Set Role Memberships. - Click the Users drop-down list and select the users.
- Click the Roles drop-down list and select the required role you want to assign / or unassign to the user
- Click Assign (or Unassign). The selected user(s) are assigned (or unassigned) the role selected for that particular project.