Defining calculated  columns allows your subject to include data that is not directly available from the connected databases. Calculated columns can be derived from any valid Progress 4GL statement, including dynamic functions.  If you do not wish to define any Calculated columns move onto the Subject Wizard - Column Attributes form by simply clicking on the 'Next >' button.

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If you do wish to add calculated columns, then click on the 'Add' button to bring up the Calculated Column form which will guide you through building a calculated column.

If you wish to Edit or Delete any of the calculated columns, simply click on the calculated column in the list view to highlight it, and then click on the 'Delete' or 'Edit' button.  If you click on the 'Edit' button, the Calculated column form will be displayed to allow you to make your changes.