Canon LBP3310 User Manual page 208

2
Open the duplex unit cover.
Holding the opening at the center of the duplex unit cover, open it gently.
3
Set the blue paper size switch lever (A) to the appropriate
position according to the paper size for automatic 2-sided
printing.
For A4 size, draw the paper size switch lever toward you.
For Letter or Legal size, push the paper size switch lever into the printer.
L T R
L G L
(A)
IMPORTANT
When performing automatic 2-sided printing, be sure to confirm the paper size
switch lever is set to the appropriate position. If the lever is not set to the
appropriate position, this may result in misfeeds or paper jams.
L T R
L G L
(A)
2-sided Printing 5-11
5