DRILLDOWNLEVEL=1= Set , , Index ]=Drills down the members of a set one level below the lowest level represented in the set, ...

DRILLDOWNLEVEL=1=«Set»[, , «Index»]=Drills down the members of a set one level below the lowest level represented in the set, or to one level below a dimension optionally selected by its zero-based index of a member represented in the set.