How do you set a Canon irc4580 to print black and white as default? We have a Canon irC4580 that standardly prints in color, but we would like to set it (globally, i.e. not per user on PC) so it prints black and white per default and color only when requested, since we are having too many people print color copies. The brochure states that it is possible, but I cannot see the setting where this would be done. Thanks in advance.