A control method of the disclosure causes a computer of an information apparatus to: display a display screen representing a floor plan for one floor including at least two rooms on the display; display device icons representing target devices within regions of the respective rooms included in the floor plan, the device icons being initially displayed at positions within the regions of the respective rooms; and when it is sensed that an illumination icon representing an illumination device among the one or more target devices is selected within a region of any room of the at least two rooms, display a region corresponding to the room, in which it is sensed that the illumination icon is selected, with brightness not less than specific brightness, in a case where power for the illumination device installed in the room, in which it is sensed that the illumination icon is selected, is on.