To create or edit a placeholder column:
In the Data Model view, single-click in the tool palette.
To create a column within a group, click in the group at the position you want the column placed in the hierarchy.
To create a report-level column, click in an open area of the canvas region.
Double-click the placeholder column object.
In the Property Inspector, set the desired properties for the placeholder column.
Set the value of a placeholder column in:
the Before Report trigger , if the placeholder is a report-level column
a report-level formula column, if the placeholder is a report-level column
a formula in the placeholder's group or a group below it (the value is set once for each record of the group)
Next step
Creating or editing a formula column
Creating a summary column (for total or subtotals)
Creating or editing a formula column
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