A display or a display terminal includes a display panel. The display panel displays commodity information of commodities displayed in a store. A touch panel is stacked and arranged on a display surface of the display panel. An RFID reader reads administrator information stored in an authentication card. When a microcomputer determines that the administrator information is read, the microcomputer changes a mode of the display or the display terminal from a normal mode to a changing mode. In the normal mode, display content of the display panel is not changed even if the touch panel is touched and designated. In the changing mode, the display content of the display panel is switched according to the touch and designation on the touch panel. When the touch panel is touched and designated under the changing mode, the microcomputer switches display content of a display area corresponding to a touched and designated coordinate between normal display for displaying only the commodity information and special display for displaying sold-out information together with the commodity information.