Which function is available in Manual mode?

The function that is available in Manual mode is Tilt. In Manual mode, pilots have the ability to control the aircraft's orientation and maneuvering directly, which includes tilting the aircraft to adjust its angle of ascent or descent and to facilitate turns. This control gives pilots a greater level of engagement with the flight dynamics, allowing them to perform intricate maneuvers as needed.

In contrast, options such as Acceleration and Infinite roll may not be fully supported in Manual mode, as they involve automated features or systems that function more effectively in Auto mode. Auto-throttle, specifically, operates by managing engine thrust without direct pilot input and is typically activated under automated conditions, not in a fully manual context. Thus, Tilt remains the function that aligns with the hands-on control characteristic of Manual mode.