Is it okay to shift gears in an automatic car without starting it?

[MacJourney]

Shifting gears in an automatic car without starting it is not a problem. The correct steps for shifting gears are as follows: 1. Press the brake pedal, then press the one-touch start button; 2. Place the automatic gear lever in the D position to enter automatic mode; 3. Gently press the accelerator pedal, and the vehicle will slowly move forward. An automatic transmission typically refers to a car's automatic gear-shifting mechanism. While driving, the control system of the automatic transmission automatically selects the appropriate gear based on the engine's speed and load, replacing the driver's subjective judgment of timing and gear-shifting operations. Generally, an automatic transmission car has six gear positions, from top to bottom: P, R, N, D, S, and L.