How to do Interactive sorting on Drill down tablix

Hi guys,

I have a small question,

I have a tablix with the below structure in SSRS.

Name     ID       Country      PName       Year

                                                           2016    2015         2014

A          50         Russia        xxx              50       

                                          yyy                         100            150

there is a Name, ID, Country where every column could be toggled and drill down. The Year column is my numeric field where I get the sum(Value) for products.

My question is, what are the steps to be taken for me to collapse the rows and apply a interactive sorting on column Year. I tried using the textbox properties and selecting groups but still nothing happens. I feel I may be selecting the wrong columns.

Can anyone help me on which columns to select and give me an idea of how to perform this.

Thanks

Lucki