1. Insert a field that uniquely identifies the field to be counted. The field may be suppressed later, so as not to include it in the actual report (for example, GiftID). Regardless, the field must be unique for each field to be counted.
  2. Right-click the field and select Insert Summary from the menu. The Insert Summary screen appears.
  3. Select distinct count from the drop-down list at the top and click OK. A new group automatically appears in the report and the distinct count summary is included in the group footer.