It would be useful on the order screens (sales and purchases) to be able to expand the list to include a view of each line item. Something like when a subtotal is performed in excel and then can see the subtotals only or can move to see what created the sub totals.
An example of use, would be on the vendor side needing to see the last three times purchased one item but currently on the page you have a list of the purchases but have to go into order to see the lines.
Or if you could have a side panel which shows the guts of the order. That might work.