>In a grid, each set of 3 columns need to have a master heard. For example, I have the same 3 fields which are duplicated several times in the same record. They have header1, header2 and header3. We also need a summar header for them. So, it may look like this:
>

>  SUMMARY1         SUMMARY2...
>H1     H2     H3     H1     H2     H3
>

You'll have to create your own. Place text objects over the column headers.