what is duplex printing

Duplex printing is a feature of some computer printers and multi-function printers that allows the printing of a sheet of paper on both sides automatically. Print devices without this capability can only print on a single side of paper, sometimes called single-sided printing or simplex printing. Duplex printing can be done either automatically or manually, and it helps save paper, reduce printing costs, increase filing space, save energy, and make the final printout lighter and more portable. It is also known as double-sided printing