Granting admin privilege to a user allows the user to perform more tasks within the system. Before you can grant a privilege to a user or member, you should be an admin user that has been granted that privilege by the admin or superuser being the system owner.
In the left menu, click User management and select User permissions
On the User Default Permissions page, select a role, e.g. Admin or User from the Choose a Role drop-down menu, make necessary changes based on the role you have selected.