Why does the dashboard display gear positions when driving an automatic transmission car?

[McJonathan]

Normally, it doesn't display. Only when a semi-automatic transmission car is shifted into manual mode will it show. Automatic transmission letters: P stands for Park, must be engaged after parking; R, Reverse; N, Neutral; D, Drive. These are the basics. For semi-automatic transmissions, some allow up and down shifting, while others have left and right shifting on the gear lever. Some cars have an O/D switch, which can be turned on during driving to force downshifting, aiding in overtaking. Some cars also have a SPORT switch for switching between sport mode and normal mode. Semi-automatic transmission: Essentially, it's still an automatic transmission but with an added manual mode that electronically switches between different gears to enhance driving pleasure.