How we can apply expand and shrink functionality in cognos

[tushar gaurav]

How we can apply expand and shrink functionality in cognos..
e.g suppose we have a table like below:
Product Line   Product Type   Product Name   Revenue
PL1   PT1   PN1   100
PL1   PT1   PN2   120
PL1   PT2   PN3   130

Now when we shrink we have data like
Product Line Revenue
PL1               250

When we expand,we have data like
Product Line   Product Type   Product Name   Revenue
PL1   PT1   PN1   100
PL1   PT1   PN2   120
PL1   PT2   PN3   130

How we can implement this scenario??

[qvixote]

In cases like that, we apply Drill down.