All available Item and Value field option displays (temperatures, pressures, hour counters) can be selected using the Up or Down buttons at any time. The Item display will revert to the default item after 35 seconds no further selection is made. Pressing the Enter button will lock any selected Item display and inhibit return to the default display. When an Item display is locked the lock key symbol will slow flash. To unlock an Item display press Up or Down to view an alternative item display or press Reset or Escape.