Add a Dimension Level to the Preferred Drill Path
You can use the Preferred Drill Path field to identify the drill path to use when users drill down in their data requests.
You should use a preferred drill path only to specify a drill path that's outside the normal drill path defined by the dimensional level hierarchy. A drill path is most commonly used to drill from one dimension to another. You can delete a logical level from a drill path or reorder a logical level in the drill path.