Canon Satera LBP3900 User Manual page 34

7
Holding the tab of the paper size setting switch (A), set it to
the left.
Cassette 1
(A)
8
Set the paper size register dial (A) to "Custom".
Cassette 1
(A)
IMPORTANT
Make sure that the paper size register dial is set to "Custom" before setting the
paper cassette in the printer. If the paper size that the paper size register dial is
indicating does not correspond with the size of the loaded paper, this may result in
printer malfunction.
Cassette 2
Cassette 2
(A)
(A)
33