Introducing nested grouping for custom tables

Charts now allows you to create nested, collapsible, multi-level groups. In other words, you can now collapse multiple groups in a single group. Each group can be a parent or a child group, which provides better handling of data visualization and organization, especially in larger datasets. In the row header, click and drag to select the groups and rows you want to nest. Then, click the more icon more icon and select Group rows.