In most tabular views it is an unwritten convention that subtotals are being shown below the records that they are totaling. In D365FO, when grid line forms are grouped by a column, those columns that are set to show a total at the bottom show a subtotal for the grouped records on top of the section with the actual records.

It would be very helpful if either subtotals get shown on an additional line on the bottom of the grouped section or if the users could select via a parameter (on view or system-wide) if the line with groupings and subtotals is shown above or below the grouped section.