How to change the motor min and max speed

i went into parameters and i went into the RC section and i changed the minimum PWM of the RC(1-6) to 800 and the maximum to 2200 for the PWM but i did not see a change in speed

The parameters that control the outputs are the SERVO group. RC are the inputs.

https://www.ardusub.com/operators-manual/rc-input-and-output.html