1. Create a group on the Zip Code field.
  2. From the main menu select Report/Change Group Expert.
  3. In the Change Group dialog box, move the Zip Code group up in order so it is Group #1 and then select Done.
  4. Suppress this Zip Code group if you do not wish to see the Zip code field.
Note: If the zip code field is a Zip+4 field then review KB BB36862 which contains the steps to use only the first 5 digits