Hi Alexander,
Based on your requirement, we
would like to inform you that aggregation will work based on the column field.
Therefore, the footer aggregate will be shown based on the field. It is not
feasible to achieve your requirement without the column field. If possible, we
suggest using the duplicate field property to achieve your requirement.
Regarding your second query, it is currently not feasible to achieve your
requirement for a footer that spans over more than one column.
Regards,
Prathap S