Brother MFC 8840D A - Manual (Page 119)

USING YOUR MACHINE WITH A MACINTOSH ® 7 - 3
2
From application software such as Presto! ® PageManager ® ,
click File menu and select Print. Click Print to start printing.
If you want to change Copies, Pages, Resolution, Paper Source
and Media Type, select your settings before clicking Print.
Device Options allows you to select Duplex.
Automatic Duplex is only available with the MFC-8840D and
DCP-8045D.