Security Manager allows granting and revoking roles. To do this, you should:
The Role Editor is available for the MariaDB connections only.
checked. Privileges included in this role are added to the user privileges. Note that some roles can be checked, if the user already has the corresponding privileges.
checked, but inactive. Some other role that is selected includes privileges of this role.
unchecked. Privileges of this role are not granted to the user.