The new physical breakdown is added to an existing installation
group.
Breakdown
The new physical breakdown is added to an existing physical
breakdown. In this case, the top item of the new breakdown will be the child
item to whatever item you select in the existing breakdown.
New Breakdown
The new physical breakdown will be a physical breakdown on its
own.
Note
If the Description check box is selected, LN selects the New Breakdown option, which you cannot change.