A350 ESV Air Systems Practice Test

The system display shows when the crew has taken manual control of the target cabin altitude. If the target altitude is entered manually as 4,000 ft, the display will explicitly indicate that the target cabin altitude has been set manually to 4,000 ft. This distinguishes manual target setting from automatic control, where the system would present an automatic mode or a calculated target rather than a manually entered value.

If the display were showing automatic operation, you’d see wording or indicators referring to automatic control rather than a manual setting. If you were adjusting the vertical speed instead of the altitude target, the display would highlight the vertical speed parameter. A fault or failure would present a fault indication rather than a note about manual setting.