A display apparatus comprising: a camera portion configured to shoot an operation panel that displays a screen including an item button for touch operation; a display portion configured to display information while allowing the user to see the operation panel; and a control portion which is configured to recognize, based on shot data obtained through shooting of the operation panel by the camera portion, a position of the operation panel in a display area of the display portion and a screen currently being displayed by the operation panel as a currently displayed screen characterized in that the control portion is configured to make the display portion display item information such that the item information does not overlap the operation panel, the display apparatus further includes a storage portion which stores hierarchy information indicating a hierarchical structure of screens which the operation panel is configured to display, the hierarchy information includes information on the item button arranged on each screen that the operation panel is configured to display, the item button is a button for performing a shift to a screen on a hierarchical level that is lower by one level than the currently displayed screen, based on the hierarchy information, the control portion makes the display portion display, as the item information, information indicating an item description of the item button arranged on a screen on a hierarchical level lower than the currently displayed screen, and the control portion is adapted to change a display position of the item information when the position of the operation panel in the display area has moved. a camera portion configured to shoot an operation panel that displays a screen including an item button for touch operation; a display portion configured to display information while allowing the user to see the operation panel; and a control portion which is configured to recognize, based on shot data obtained through shooting of the operation panel by the camera portion, a position of the operation panel in a display area of the display portion and a screen currently being displayed by the operation panel as a currently displayed screen a position of the operation panel in a display area of the display portion and a screen currently being displayed by the operation panel as a currently displayed screen characterized in that the control portion is configured to make the display portion display item information such that the item information does not overlap the operation panel, the display apparatus further includes a storage portion which stores hierarchy information indicating a hierarchical structure of screens which the operation panel is configured to display, the hierarchy information includes information on the item button arranged on each screen that the operation panel is configured to display, the item button is a button for performing a shift to a screen on a hierarchical level that is lower by one level than the currently displayed screen, based on the hierarchy information, the control portion makes the display portion display, as the item information, information indicating an item description of the item button arranged on a screen on a hierarchical level lower than the currently displayed screen, and the control portion is adapted to change a display position of the item information when the position of the operation panel in the display area has moved.