the operator again presses operator input device 70 electronic controller 46 will drive display 48 to display not the actual percentage of fill of the grain tank or total bushels in the grain tank but some lesser value equal to the percent of grain in the grain tank proportionate to the actual fill level at the time the operator manipulated the operator input device for example assume the operator selects operator input device 70 when the actual fill level is 50 from then on electronic controller 46 will scale the display 48 such that u201c 0 u201d appears on the display 48 when the tank is empty i e 0 full and 100 appears on the display 48 when the grain tank 20 is 50 full this may be useful for example if the grain cart has a limited capacity and can only receive 50 of the grain tank capacity at that time if this was the case the operator would want to know when he has one grain cart 39 s worth of grain stored in the grain tank having display 48 show u201c 100 u201d when it is time for the grain cart to unload the combine would be a convenience to the operator the operator can follow the same process to reset electronic controller 46 to its.