Brother MFC-3420C - Manual (Page 40)

LOADING ORIGINALS AND PAPER 2 - 3
Using the scanner glass
You can use the scanner glass to fax pages of a book or one page
at a time. Original must be letter size (8.5 inches to 11 inches).
1
Lift the document cover.
2
Using the document guidelines on the left, center the original
face down on the scanner glass.
3
Close the document cover.
To use the scanner glass, the ADF must be empty.
If the original is a book or is thick, do not slam the cover or press
on it.
Originals are Face Down
on the Scanner Glass