To adjust the contrast on the display to a comfortable level:

  • Press Menu button.
  • Select Settings followed by Basic, Contrast.
  • Pressing the Polycom 430 Up button or Polycom 430 Down button soft keys or volume keys will increase or decrease the display contrast.
  • Press the Ok or Cancel soft keys to accept or reject changes.
  • Press Menu button or the Exit soft key to return to the idle display.