A display device, comprises: a display part that displays a first display area and a second display area across a boundary and displays operation screens in the respective first and second display areas; a manipulation part that detects a user operation performed to a display screen of the display part; and a hardware processor that: determines whether or not a first operation and a second operation have continuity when the second operation is detected in the second display area after the first operation is detected in the first display area; and updates the operation screen in the first display area in response to the second operation when the first operation and the second operation are determined to have continuity, and updates the operation screen in the second display area in response to the second operation when the first operation and the second operation are determined not to have continuity.