Okay, Just checked the B737 checklists and there is, on the pre-flight checklist, a 'line' per-se that indicates it is where the crew complete the Loadsheet critical data setting.
It comes after CDU preflight and before Taxi and take-off briefing which makes sense.
The only other 'line' is in the before take-off checklist as described above.
This is all from the Boeing QRH which follows Boeings flight philosophy.
Hope that helps.