Where is the Selected Altitude displayed on the altitude scale?

The correct answer is that the Selected Altitude is displayed within a blue box on the altitude scale. In the A320’s Primary Flight Display (PFD), the Selected Altitude indicates the altitude the pilot has chosen to maintain or reach. The visual representation of this selected altitude is crucial for situational awareness, allowing the pilot to quickly identify the target altitude during flight operations.

When the Selected Altitude is displayed in this manner, it stands out clearly against the other altitude markings, helping pilots quickly verify their altitude settings. The presence of the blue box specifically indicates that this altitude is actively chosen by the crew, distinguishing it from other altitude indications on the display.

Other options, while they describe different features and alerts on the PFD, do not accurately describe where the Selected Altitude is presented. The PFD altitude window flashing magenta indicates a warning condition, such as when the aircraft is not at the selected altitude, rather than showing the selected altitude itself. The IVSI (Instantaneous Vertical Speed Indicator) window serves a different purpose, providing information about the aircraft's vertical speed rather than selected altitude. Lastly, the bottom of the altitude scale typically represents various altitude references or targets but does not specifically highlight the selected altitude in the way that the blue