By default, Martial Class uses the default printer settings for printing reports.
Martial Class can, however, store a selected printer and associated settings (duplex, papersource, papersize, etc) for a given user and computer.
To change the defaults for a certain report, hold down the <Shift> key as you open a report, or when you click the Print button on the report preview screen. After selecting the printer and various defaults, choose print and a second dialog will pop up asking if these new settings should be stored as the new defaults for this report.
These settings are NOT global. They effect only the current user on the given pc, this allows for a high degree of customisation.