How do I perform duplex (two-sided) printing from Windows?

In your software program, click Print, select the product, and click Properties or Preferences, then click the Finishing tab and check the 'Print on Both Sides (Manually)' checkbox. Click OK to print the first side, then remove the printed stack from the output bin and reload it print-side down into the input tray in the same orientation. Press OK on the control panel to print the second side. (Pages 17-18)