Really badly need "Total Editing Time" as a property.
It would be very helpful if Excel could record the total editing time spent working on a spreadsheet. Or if Excel could better still, automatically log each time period spent editing a spreadsheet. Helps when billing customers and giving volunteer hours as I do a lot with Excel.
Kenneth Barber commented
Would that be "total time that the file is open" or "total time where the user is actually doing something in the file"?