Transforming pivot table back to the source table

Hi

I am new to pivot tables so I've downloaded a xls file with generated pivot table to study
it. I understand all the grouping and filtering but to fully understand it I would like
to see the original source table. I don't know how to get the source table as pivot table
was generated at the same sheet. Plz help!

Tnx

if you are using Excel 2010
click inside the Pivot Table ( Pivot Table tools appears up)
click options
click Change data Source
and you are there