List & Label Reporting Blog
In addition to the drilldown via relations which we already had in the product for a couple of versions, you can now trigger a sub report that uses report parameters and set the parameter values depending on the item that you just clicked in the preview. This terrific feature works for pie/donut and bar charts, shapefile charts, table fields and crosstab contents. Of course, a drilldown report can contain another drilldown, too.
As with all the feature focus articles, keep in mind that this feature is not yet available in the current version, it will be part of List & Label 20.