Primary Flight Display Symbols
The Altitude Indicator displays altitude in green on a white moving scale. NEG appears in window to indicate negative altitude.
Window flashes yellow when approaching within 750 feet of the FCU-selected altitude or flight level and stops flashing within 250 feet. Window flashes amber if the airplane deviates from the selected altitude or flight level by 250 feet.
Numerical value changes from green to amber when the airplane is at or below the MDA entered in the MCDU.