The limits of technological design in technical appliances are being pushed back further and further. The enormous technological progress in all areas continues to set new, complex tasks for engineers, product developers and designers. The major challenge facing them consists increasingly in making technological developments fit for practical use. Here, the prerequisite is a clearly presented interface between complex technology and untrained users, which is easy to understand and easy to operate. Only when needed does it become visible, offering the user intuitive access to the LUCTRA® functions.