1.Select the desired data row to add the column to by clicking the Data Row # button. The active data row button will appear in a "down" state.

 

2.Select the data column to add from the available columns list.

 

3.Click the Insert Field button to move the data column from the available columns list to the active data row.

 

4.Optionally click the Field Up  or Field Down buttons to move the data column to the desired location in the list.