If you already know what is a printer duplexer then follow these steps below to get a duplex print of your documents:-
1. Go to the file menu if you want to print a sheet from MS Office.
2. Then click on the print button.
3. Now from the print button you have to click on Print One Sided to change the settings.
4. Then change the settings to Print on Both Sides.
5. Then finally click on the print button to get a duplex print.