how to make drop-down lists in sql report

Question

Could anybody help, please?

I'm confused a bit about where that feature could be find in VS and some docs about it thanks in advance

Answer 1

Your screenshot is showing a feature called Drilldown.

With this, you can show or hide report items by setting the ToggleItem property to a textbox outside of the item Scope.

You can see more information at Books Online:

Hiding and Showing Report Items by Adding Drilldown.

Add an Expand/Collapse Action to an Item.