Is there an easy way to invert the direction of the extruder in the

Is there an easy way to invert the direction of the extruder in the code

Physically, you can just flip the stepper motor’s connection.

https://github.com/ErikZalm/Marlin/blob/Marlin_v1/Marlin/Configuration.h#L359

#define INVERT_E0_DIR true/false

Or just switch the coils wiring to the stepper drivers.

Thats interesting because I’ve change that setting @Andrew_Hodel thinking it would invert it with no result. I just dont want to switch the wires if I dont have to

Yup most steppers are on 2 poles with B- (possible common) B A (possible common) A-

You can just switch the polarity.