Brother MFC-8820DN - Manual (Page 209)

HOW TO SCAN USING WINDOWS ® 13 - 13
PreScanning to crop a portion you want to scan using the
scanner glass
The Preview button is used to preview an image for cropping any
unwanted portions from the image. When you are satisfied with the
preview, click the Scan button from the scanner window to scan the
image.
1
Place the original face down on the scanner glass.
2
Make sure you selected Flatbed in the Paper source pull-down
box (A).
3
Select the picture type (B).
Scanning area
A
B