Canon 3743B002 Basic Manual page 244

Click OK on the Page Setup tab.
When you execute print, the document will be printed on one side of a sheet of paper. When the
printing of one side is complete, load the paper correctly by following the message and click OK.
The document will be printed on the opposite side.
Important
Duplex Printing appears grayed out and is unavailable when:
A media type other than Plain Paper is selected from the Media Type list.
Poster is selected from the Page Layout list.
When Booklet is selected from the Page Layout list, Duplex Printing and Staple Side appear grayed
out and are unavailable.
Note
When you select borderless printing during duplex printing, a dialog box for media type selection
may appear. If that happens, select Plain Paper.
If the back side of the paper becomes smudged during duplex printing, perform Bottom Plate
Cleaning in the Maintenance tab.
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