When this system is set to on, the sound coordinate factors(Bass frequency, Bass quality, Bass extension, and Treblefrequency) appear during the audio control mode.Display and setting:"ec4/dB (set) ON" : The sound coordinate factors appear andcan be adjusted."ec4/dB (set) OFF" : The sound coordinate factors are notappeared.ec4/dB (Sound Coodinate system)This function allows you to turn off the lower part of thedisplay if there is too much information in the display.Display and setting:"BLK MASK/BMSK ON" : The display will turn on by using onlythe upper part of the display and theIN indicator (KRC-678R/678RV only)."BLK MASK/BMSK OFF" : The display will turn on by using thewhole part of the display.Black MaskDisplay and setting:"Graphic/GRAP ON" : The graphic display works."Graphic/GRAP OFF" : The graphic display does not work.You can turn the movement of graphic display on and off.The initial setting is ON.Switching Graphic DisplayFunction of the KRC-678R/KRC-678RVYou can dim the display.The dimmer function is not available for units if the dimmer cableis not connected.Display and setting:"Dimmer ON" : The dimmer setting is on."Dimmer OFF" : The dimmer setting is off.NOTEDimmerFunction of the KRC-678R/KRC-678RVThis adjustment permits easy viewing of the display.Display and setting:"Contrast 0" – "Contrast 10"The initial setting value is "5" .NOTEContrast AdjustmentYou can switch the colour of the button illumination betweengreen and red.Display and setting:“Color Green/COL GRN” : The colour of the illumination isgreen.“Color Red/COL RED” : The colour of the illumination is red.Selectable Illumination— 29 —