The overview page on the syncfusion website mentions the ability to "drill through" and obtain the specific information on a data entry that contributes to the selected number. However, there appears to be no documentation on this for winforms.
JPJagadeesan Pichaimuthu Syncfusion Team May 28, 2019 04:53 AM
Thank you for contacting Syncfusion support.
We have analyzed the reported query “How to achieve the drillthorugh support in the pivot grid control”. You can get the specific information for the selected cell by using the GetRawItemsFor method which is available in PivotEngine. GetRawItemsFor method is used to obtain the list of raw items for value cell, total cell or grand total cell in the pivot grid. You can find out the selected row and column index values by using CellClick event handler.