Lexmark C510 - Duplex Printing on Letterhead; Using Duplex Bind

Using the duplex function (two-sided printing)
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Media specifications
For sizes that are acceptable for duplex printing, see Media sizes and support.
Select Duplex from your printer driver to print individual duplex jobs.
Duplex printing on letterhead
When duplex (two-sided) printing on letterhead from the trays, load it with the logo facedown and
entering the printer last.
Using Duplex Bind
When you select duplex bind printing in the printer driver or Duplex Bind in the Finishing Menu, you
must select either long edge or short edge binding, which are the values for this setting. The purpose
of Duplex Bind is to define the way duplexed pages are bound, and how the printing on the back of
the sheet (even-numbered pages) is oriented in relation to the printing on the front (odd-numbered
pages).