Brother MFC-3420C - Manual (Page 158)

9 - 3 USING YOUR MACHINE WITH A MACINTOSH ®
4
From application software such as Presto! PageManager ® , click
the File menu and select Print. Click Print to start printing.
If you want to change Copies, Pages, Quality, Media Type and
Color/Mono, select your settings before clicking Print.
Click the Option button to change Document and
Printing Options.