Abstract: An engineering device including a menu selector selecting an operating menu; a program group display controller displaying, on a display screen, screens relating to each of one or more programs, grouped in advance as a program group relating to the operating menu selected by the menu selector; a program launcher activating a program other than the engineering tool and displaying, on the front-most screen of the display screen, a screen relating to the other program that has been activated; a screen switch switching the display of the display screen so as to move, to the front-most screen of the display screen, screens relating to the individual programs that have been set as the program group, when there has been a screen switching request; and a screen display controller adjusting the size or position of respective windows for each of the screens in response to a display position adjusting instruction.