If you're a super admin, you can modify, add, or remove an admin account or a super admin account easily.
If you're an admin, you have only the right to modify your password not add any admin account. Also, you can configure the rights of an admin in the "User Groups Settings".

If you're a super admin, chose the account you want and then click the "Modify" button, enter your new password. Your old password will be modified with the new one after you click the "Save"button (If you don't enter a new password, as default, your old password won’t be modified.). You can also modify your user groups in the ComboBox.
 
If you're an admin, you can only modify your own password. Click the "Modify" button, enter your new password. Your old password will be modified with the new one after you click the "Save" button (If you don't enter a new password, as default, your old password won't be modified.).

If you're a super admin, click the "add" button; enter new username and password, chose user group in the User Group ComboBox. A new account will be created after you click the “Save” button. As the super admin, you can also delete or modify an admin account.