Need help to understand IK

Thank you for your reply @FrostyJas

I already checked that part of the documentation but it doesn’t cover the ControlRig named “CR_Mannequin_BasicFootIK” which can be found in the ThirdPersonTemplate which is used by the Mannequin?

Also the docs don’t say anything about the difference between Screenshot 2023-04-19 164010 and Screenshot 2023-04-19 164021 ?
Can you please explain what is the difference between the two?

As far as I can tell the ControlRig provided in the ThirdPersonTemplate is pretty much straight forward but I am wondering what my Mixamo Character does different than the Mannequin in order to understand where these values

image

come from (Add 5, Add 30, Subtract 50)? Is it because this is the intended offset from the floor to the feet when animating or what could they possibly mean?