Workflow/how-to for Pen Offset / Scribe Offset (from XY of plasma torch center)

I searched and googled and somehow missed if this is answered. Please forgive me if I overlooked it in documentation. (There is a lot to take in.)

What is the normal "best practice" workflow / how-to for setting an Offset for a Pen or Scribing tool? (Setting XY offset from the plasma torch center)?

linuxcnc.org/docs/2.9/html/plasma/qtplas...l#peripheral-offsets

linuxcnc.org/docs/2.9/html/plasma/qtplasmac.html#plasma:scribe

Many thanks for being awesome!