A display control unit performs at least one of the change of the display contents of a light amount level-display section on a light amount display screen in conjunction with the selection of a specific emphasis/suppression mode from a plurality of emphasis/suppression modes, the change of the display contents of the light amount level-display section in conjunction with change of the display contents of an emphasis/suppression amount-display section on an emphasis/suppression mode-selection screen, or the change of the display contents of the emphasis/suppression amount-display section in conjunction with the change of the display contents of the light amount level-display section.