You can print received files on both sides of the selected paper, enabling you to save paper.
1.
Press 
(Settings/Registration).
(Settings/Registration). 2.
Press [Function Settings] → [Receive/Forward] → [Common Settings].
3.
Press [Print on Both Sides].
4.
Press [On] → [OK].
Select [Off] if you do not want to enable two-sided printing.