Brother MFC-3420C - Manual (Page 100)

4 - 24 USING THE WINDOWS ® XP-BASED BROTHER SMARTUI CONTROL CENTER
To change the destination application select the appropriate
application from the Application pull down list.
To change the other configuration options click the Link
Preferences button.
This option enables you to reduce image to screen resolution
(96dpi), show a warning if the item has annotations, update the
original item if sent item is modified, if needed.