Roles can be assigned to each step as you create the Activated Checklist, so you won't be able to change roles on the Responsibilities tab.
To add, remove or change a role on each step, use the following instructions:
- Click the edit button of the Activated Checklist
- Click the arrow on the right hand side of step.
- Select a role from the drop down field titled "Role assigned to this step".
- Click the Save button.