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==PC==
To print on both sides of paper you must enable duplexing by following the instructions below.

# Open the Printers Control Panel: Start Menu > Settings > Printers.
# Right-click on your printer and select Properties.
# On the General Tab, click Printing Preferences.
# Click on the Finishing tab, and check print on both sides.

[[Image:pcduplex4250.jpg|thumb|center|530px]]


'''If you do not see this option, try following the instructions below.'''
# Open the Printers Control Panel: Start Menu > Settings > Printers.
# Right-click on your printer and select Properties.
# On the Device Settings tab, under Installable Options, click on the drop down menu next to '''Duplex Unit''' and click '''Installed'''.

[[Image:duplex.gif|thumb|center|530px]]

====Macintosh OSX====

* After installing the printer, you will be presented with this screen, please select duplex unit.

[[Image:macduplex.png|thumb|530px]]
<div class="clear"> </div>

* Your printer is now installed with the duplexing option turned on.

* To make your Microsoft Word document duplexes (print on both sides): have your Word document open and ready to print, click on File-->Print, in the third drop down menu, please select Layout and choose on Long-edged binding, as shown below.

[[Image:longedgemac.png|thumb|center|530px]]

* Click Print. Your document will print on both sides using the HP Laserjet 4250.

* You can save this setup as a preset by following the above directions and choosing Save As... from the second drop down menu.  Give the preset a clever name, click save and the next time you need to print on both sides just choose this new preset from the drop down menu.