And noting that map-level progressively chops out the offsets, starting with the level-1 offset.

Undocumented feature for export of maps?

At least it does not change the map-connection line behaviour.

export map -projection plan  \

  -layout LayoutMapThisCave       \

  -layout LayoutMapThisCavePlan   \

  -output ../Output/PlanMap.pdf

select PlanMap@Cave -map-level 0

select PlanMap@Cave -map-level 1

select PlanMap@Cave -map-level 2

select PlanMap@Cave -map-level 3

select PlanMap@Cave -map-level 4 (and -map-level basic and -map-level 5 etc)

Bruce