What indicates that the landing altitude was set manually by the pilot?

When the landing altitude is displayed in cyan color, it indicates that the pilot has manually set this altitude. This is a standard practice in aviation to visually differentiate between automatic and manual settings. When the altitude is set manually, it helps the pilot easily identify their own input and ensures that there is no confusion with altitudes automatically assigned by the aircraft's systems.

In contrast, the other display options serve different purposes: for example, red typically alerts to a critical situation, flashing could signify a warning or a need for attention, and an error message indicates that there is an issue that needs resolution. These visual cues are important in the cockpit environment but do not specifically relate to manual input of the landing altitude.