A display control device that comprises a processor and a memory coupled to or integrated with the processor and controls display of an operation screen of an information apparatus, the operation screen comprising, as main functions, a copy function of copying a document, a scanning function of reading a document, or a facsimile function of transmitting an image obtained by reading a document as image data, and wherein, in a case in which a selected main function is arbitrarily selected, the processor is configured to display the selected main item above a plurality of first layer setting items displayed in a list form in the operation screen, which are setting items for setting processing conditions of the selected main function, wherein, in a case in which a selected setting item is arbitrarily selected from the plurality of first layer setting items displayed in a list form in the operation screen, the processor is configured to hide the first layer setting items other than the selected first layer setting item, display the selected first layer setting item on an upper side of a display region in which the plurality of first layer setting items were displayed in a list form and in a region where the selected main function was displayed, and additionally display a list of relevant second layer setting items related to the selected first layer setting item below the selected first layer setting item and wherein further, in a case in which a second layer setting item is arbitrarily selected from the list of second layer setting items, the processor is configured to hide the second layer setting items other than the selected second layer setting item, display the selected second layer setting item on an upper side of a display region in which the list of second layer setting items were displayed and under the selected first layer setting item, and additionally display a list of relevant third layer setting items related to the selected second layer setting item below the selected second layer setting item. the operation screen comprising, as main functions, a copy function of copying a document, a scanning function of reading a document, or a facsimile function of transmitting an image obtained by reading a document as image data, and wherein, in a case in which a selected main function is arbitrarily selected, the processor is configured to display the selected main item above a plurality of first layer setting items displayed in a list form in the operation screen, which are setting items for setting processing conditions of the selected main function, wherein, in a case in which a selected setting item is arbitrarily selected from the plurality of first layer setting items displayed in a list form in the operation screen, the processor is configured to hide the first layer setting items other than the selected first layer setting item, display the selected first layer setting item on an upper side of a display region in which the plurality of first layer setting items were displayed in a list form and in a region where the selected main function was displayed, and additionally display a list of relevant second layer setting items related to the selected first layer setting item below the selected first layer setting item and wherein further, in a case in which a second layer setting item is arbitrarily selected from the list of second layer setting items, the processor is configured to hide the second layer setting items other than the selected second layer setting item, display the selected second layer setting item on an upper side of a display region in which the list of second layer setting items were displayed and under the selected first layer setting item, and additionally display a list of relevant third layer setting items related to the selected second layer setting item below the selected second layer setting item.