System and a method by means of which different windows of an Multi Document Interface (MDI) application can be displayed at the same time within an application on several screens. In addition, instances of the source frame of the MDI application are displayed on further screens and the windows of the application with the corresponding documents can then be displayed in the sequence frame instances of the MDI application. In this way, the display of the parallel side-by-side arrangement of several windows on several screens is possible, the resolution of the window being adapted to the screen resolution.