1. A method of displaying a vehicle's information on a display device, comprising: measuring a set of diagnostic and state values of the vehicle; comparing the set of measured values with a set of related predetermined values, the set of predetermined values being within a preset range for operation of the vehicle; displaying on a video image a graphical depiction of the present measured value; and displaying on the same video image, a graphical depiction of the measured set of values in comparison to the related predetermined set of values, with the comparison changing color of a certain portion of the graphical depiction.