CNC V3 Shield Arduino Pinout (Which Arduino Pins Connect Where On A CNC V3 Shield?) 

I've often struggled to find information about how to control the pins on an Arduino CNC V3 shield directly, so I decided to figure it out and hopefully help others with the same problem.
When using the shield it is not uncommon to simply upload a version of GRBL which takes care of everything. However, what if you don't want to do that and want code your own commands? You need to know which pin commands in the code link to which pins on the CNC shield.
Hopefully this video helps.
Buy Arduino, shield and stepper motor driver set (affiliate link):
amzn.to/3n5Janr
0:00 Intro
0:35 Pins Used To Control Stepper Motors
2:37 Pins Not Connected To Arduino
3:50 Non-Editable Pins
4:39 Digital Pins
5:37 Analog Pins
6:23 Communication Pins
7:22 Using Different Arduino
7:46 Schematic and Outro