Some models of the printer have automatic duplex / 2-sided printing and other models have manual duplex / 2-sided printing.
Printing on both sides of the paper
If you want to print two-sided pages for every print job, or for most print jobs, then select Duplex in the Finishing menu. To access the Finishing menu, do one of the following:
If the printer is connected to a computer by USB or parallel cable, then open the Local Printer Settings Utility for Windows or Printer Settings for Macintosh. One of these utilities installs with the printer software.
For occasional two-sided printing, you can request two-sided printing in the printer software. Do one of the following, depending on your operating system:
For Windows users
With a document open, click File 
Print.
Click Properties, Preferences, Options, or Setup.
Under the Page Layout tab, select 2-sided printing (duplex).
Select Long edge or Short edge.
Click OK.
For Macintosh users
With a document open, choose File > Print.
If necessary, click the disclosure triangle to see more options.
From the print options, Copies & Pages, or General pop-up menu, choose Layout.
From the Two-Sided pop-up menu, choose a duplex setting.
Click Print.
Printing on both sides of the paper manually
If your printer does not have automatic two-sided (duplex) printing, and you want to print a duplex document, then you must use the manual duplexing method. This method involves printing the odd-numbered pages, and then flipping and reloading the stack of paper to print the even-numbered pages on the other side of the sheets.
To duplex all print jobs, select Duplex in the Finishing menu. To access the Finishing menu, open the Local Printer Settings Utility for Windows or Printer Settings for Macintosh. One of these utilities installs with the printer software.
To duplex a single print job, do one of the following:
For Windows users
With a document open, click File Print.
Click Properties, Preferences, Options, or Setup.
Under the Page Layout tab, select 2-sided printing (duplex).
Select Long edge or Short edge.
Click Paper.
Select the appropriate Input options for your print job.
Click OK.
Click OK on the Print window.
The printer prints every other page of the document first. Once the first side of your job prints, the 
light comes on, and the 
l button light blinks.
- On
- Blinking
Load the paper back into the printer with the already-printed side up and the top of the page toward the front of the tray.
For Macintosh users
With a document open, choose File Print.
From the print options pop-up menu, choose Paper Handling.
From the “Pages to print” or Print menu, select to print the odd-numbered pages.
Click Print.
After printing the first set of pages, flip and reload the stack of printouts.
Repeat steps 1 and 2.
From the “Pages to print” or Print menu, select to print the even-numbered pages.
Click Print.
