The sensitive surfaces offer intuitive and convenient operation with UNI-TOUCH®. The control wheels respond to touch. As soon as you touch them, a pop-up window appears in the central display showing the current function or setting value. You can change this value by turning the control wheel. Use the memory buttons (M1–M3) to select functions: press the button lightly until you feel it click to display the function on the display. Press it all the way down to activate the selected function.