An order and elements constituting the order are hierarchically managed such that the order is in the uppermost level and the subsequent elements obtained hierarchically in the subsequent descending (higher to lower) steps are in the respective levels provided in descending (higher to lower) order. The range of the levels based on the level to which the element read by the bar code being the identifier of each element of the order is previously set as the range of the levels to be displayed as the candidates of the reprinting-target elements. Further, the bar code is previously printed on the printed material.