The PivotGrid control has the drill down (expand) and drill up (collapse) support to visualize the pivot information in both abstract and detailed views. This can be achieved by clicking the expander button of parent node in UI level and by calling the respective methods programmatically. If we try to expand the single node when the entire fields are collapsed, considerable amount of time had been taken. This occurs only when the visibility of row and column subtotals are set to false. On the other hand, there is no performance constraint while expanding a single node if the subtotals are visible.