Duplex printing is a feature that allows you to print on both sides of the paper. This can be useful for saving paper or creating double-sided documents. Many Epson printers have duplex printing capabilities, but not all models do. To find out if your printer has this feature, check the printer's specifications or consult your owner's manual. If your printer does not have duplex printing, you can still print double-sided documents by printing the odd-numbered pages first, then flipping the paper over and printing the even-numbered pages.