How to always show dimension name in Pivot Table ?

[#1]

Hi everybody , I create a pivot table with 3 dimensions and 1 expression.
Something like that :

Grp Customer	Customer Code	Customer Name	Quantity
000	10	Adam	100
000	20	Josepe	250
A00	10	Jules	22

When i "reduce" the dimension Grp Customer , I'll like to always show  the others dimension .
By default all next dimension will be hidden

Default Result :

Grp Customer	Quantity
000	350
A00	22

Wanted Result :

Grp Customer	Customer Code	Customer Name	Quantity
000			250
A00			22

Some one can help me please ?