Please click the image for watching Configuration of Permissions and Roles

1. After login as admin, click the Admin button and click Roles option.
2. You can change the permission for Add board in the Users tab and in the Boards tab, you can change the permissions to the board roles of the users such as Add card, Edit/Delete Labels , etc.,
3. In the organizations tab of the Roles option, you can change the permission of the organization roles assigned to the users
4. You can change the user roles in the users listing page by selecting the roles from the roles option in the users listing page.