Motor Spin Direction
The motor spin direction can be changed using DShot commands on PX4, Ardupilot and Betaflight.
PX4
Motor configuration is done using the Actuators tab in QGroundControl.

Select DShot protocol for your motors
Configure the direction in the Geometry tab. This tells PX4 the direction the motors will spin.
Use the "Set Spin Direction" buttons to change the spin direction for each motor. You can lightly touch each motor to ensure the spin direction matches the geometry you selected above.
Betaflight
Connect your board using the betaflight configurator. Navigate to the Motors tab. Select Motor direction and follow the prompts.

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