Drill down on a custom set

[nsd]

Hi

Using multi-dimensional data I have a custom set from the stores dimension.

Dept Stores  = set(StoreA, StoreB)

I would like to show Dept Store and then allow someone to drill down to see Stores A and Store B. How do I do that?

When I drop Dept Stores into a crosstab it automatically shows all the members.

Thank you.