On the Edit Source/Configure New Object dialog box, select the Options tab.
Click the Add button to add a row to the end of the table, or select an existing row in the table and click the Insert button to insert a row after the selected row.
To select an attribute, click on the attribute in the table and select from the drop-down list.
If you are using the Aggregate retrieval mode, select a function to use on the group of returned attributes. (Click on the function in the table and select from the drop-down list).
If the attribute is Value, Previous Value, or Value, and you do not want the value type to be string, select the As Numeric check box.
TIP: Buttons are also available for deleting rows (selected row or all rows) and to change the order of the rows that appear in the Attributes to Return table.