Duplex Printing Instructions
Once you have selected the document or web page that you would like to print, click on File
Choose which printer you would like to use
Click on Preferences or Properties (for web pages it will be Preferences; for documents created in Word, Excel, Adobe, etc. it will be Properties). See the picture below for an example:
On the right-hand side under Duplex, click on the drop-down and select Open to Left (see picture below).
Then OK again