You can add incoming fields to the output individually or you can add an entire input group. After you add the incoming fields to the output group, you can rename or delete output fields as needed.
To add output fields, select the check box next to the input field or input group that you want to add. Selecting a parent automatically selects all child items, but you can deselect the entries that you do not want. You can also delete any unneeded entries from the output.