Portenta Machine control functions

I have installed the machine contol library and tried the functions "digital_outputs.set" and "digital_inputs.read".
Some questions remain:

  1. Where can i find a description of the commands available in the library?
  2. Can i use the standard commands "digitalRead" and "digitalWrite" and how do i adress the pins in such case?
  3. Can i use the "AccelStepper" library with Portenta H7 / machine control? How to adress pins? If not, is there a similar library that works?