The Contour display shows the current reverb shape and early reflections as a two-dimensional graph. Both front and rear reverb tail shapes and early reflections can be viewed at the same time. Buttons below the display allow you to select the type of data being displayed.The ER (early reflections) button toggles display of early reflections on or off within the Contour display. When the ER button is illuminated, early reflections data is displayed. When the ER button is not illuminated, early reflections data is not displayed. Both early reflections and reverb contour data can be displayed simultaneously.The RC (reverb contour) button toggles display of the reverb contours for both the front and rear channels on or off within the Contour display. When the RC button is illuminated, the reverberation envelopes are displayed. When the RC button is not illuminated, the reverberation envelopes are not displayed. Both early reflections and reverb contour data can be displayed simultaneously.The Front button toggles display of the front channel reverb contour and the front channel early reflections on or off within the Contour display. When the Front button is illuminated, the initial reverberation envelope and early reflections for the front channels are displayed. When the Front button is not illuminated, they are not displayed.The Rear button toggles display of the rear channel reverb contour and the rear channel early reflections on or off within the Contour display. When the Rear button is illuminated, the initial reverberation envelope and early reflections for the rear channels are displayed. When the Rear button is not illuminated, they are not displayed.