Polycom SoundPoint 650 - Display Contrast
To adjust the contrast on the display to a comfortable level:
  • Press [menu].
  • Select Settings followed by Basic, Contrast.
  • Press the Up or Down soft keys to increase or decrease the display contrast.
  • You can also use the volume keys to increase or decrease the diplay contrast.
  • Press the Ok or Cancel soft keys to accept or cancel changes.
  • Press [menu] or the Exit soft key repeatedly to return to the idle display.
Display Contrast