The previous section showed how to change headings that are the names of variables or statistics, but classification variables also use data values as headings. These data values are called class level headings. When you change class level headings, you are changing the way those data values are displayed. To change the way data values are displayed, you use a format.
To modify an existing report, right-click the Summary Tables task icon in the Project Explorer or Project Designer and select Open. The Summary Tables window will open.