Brother MFC-8640D - Manual (Page 77)

4 - 5 USING CONTROLCENTER2.0
SCAN
This section contains four buttons for Scan to Image, Scan to OCR,
Scan to E-mail and Scan to File applications.
Image (example: Microsoft Paint)
Scan to Image feature allows you to scan an image directly into your
graphics application for image editing. To change the default
settings, right-click on the button and select Software Button.
Change the other settings, if needed.
By selecting Device Button at each Scan button, you can
configure the Scan key on your machine for each scan feature.