Rotate outer ring to move the highlight bar on the active screen
If Left or Right button is held for 2 seconds, outer ring becomes Volume or Brightness adjustment
Press once for Back (same as Left button on screen)
Press and hold for 2 seconds
to adjust Volume Up/Down from outer ring
Press once for Center menu bar item
Press and hold for
2 seconds to suspend
power or turn on
Press once for Source (same as Right button on screen)
Press and hold for 2 seconds to adjust Brightness from outer ring
Press to select the highlighted menu item
LeftCenter Right