Primary Flight Display Symbols
Selected Target Altitude
Selected Target Altitude indicates the target altitude in feet if selected QNH altitude is the barometric reference. Selected FL is displayed if STD is the barometric reference.
When the FMGC operates in the vertical manage mode the symbol is a magenta color if it represents an altitude constraint that the FMGC will follow. If it represents the FCU altitude constraint, then the target altitude is a blue color.