You can drill down dimensions in a bar graph or pie chart widget to view data at a lower granularity. You can use the default system dimension hierarchies or create your own.
- Create a Drill-Down Hierarchy
You can choose the dimensions to include in a hierarchy. - Add a Drill-Down Hierarchy to a Widget
You can add a hierarchy to a bar graph or pie chart widget. - Default Dimension Hierarchies
When using drill-down, these system hierarchies are used, listed from the highest to lowest dimension in the hierarchy.