Print From Your Computer : Macintosh Printing (Mac OS X 10.4)

Print Double-Sided
With the auto duplexer, you can print on both sides of the page automatically.
1.
Select 2-sided Printing Settings from the pop-up menu.
2.
Select 2-sided Printing.
3.
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5.
If necessary, click Adjustments to adjust the print density and drying time to prevent ink from bleeding through the page when you print on plain paper.
When you’re finished, you’re ready to print.