The Back From Lunch Checklist is a special Checklist that is triggered every time an Employee clicks the Back From Lunch button in the Factory version (see highlighted below).
If the Go To Lunch and Back From Lunch buttons are not visible or to learn more about Go To Lunch / Back From Lunch see Lunch Breaks.
The Back From Lunch Checklist differs from other Checklists in that it does not need a Trigger to be added.