An important function of the front end application is the interaction of the user with the application. Thus the user can choose the different views as well as the process data and charts to be displayed. E.g. for the implementation in the ARViewer a special library is used that include the mouse, keyboard and touchscreen input. User friendliness is an important aspect, especially for the handling using the touchscreen. With the used neatly arranged 2D elements the user can retrieve the important information intuitively.