Double-sided printing not working

Look for a two-sided, duplex or print on both sides option. In classic dialogs it's often behind the Printer Properties or Preferences button; in the modern Windows 11 print window, check under More settings. Use flip on long edge for portrait pages and short edge for landscape or top-bound pages.

Open Settings > Bluetooth & devices > Printers & scanners, select your printer and click Printer properties. If there's a Device Settings tab, find the duplex unit under installable options, set it to Installed and click OK.

If Windows added the printer automatically, it may be using a basic driver with limited options. Download the full driver package for your model from the maker's official support site, install it, and print again.

To print two-sided every time, turn it on in Printing preferences rather than in each app's dialog.

In the print dialog, turn on Two-Sided or Double-sided; the name and position vary between macOS versions, and on some it's in the Layout section. Choose long-edge binding for normal portrait documents.

Open System Settings > Printers & Scanners, click your printer, then Options & Supplies > Options. If there's a duplex or two-sided unit checkbox, turn it on and click OK.

If the option still doesn't appear, Control-click the printer in the list and remove it, then click Add Printer, Scanner, or Fax, select it again and choose AirPrint or the maker's driver from the Use menu.

Check your manual or the specifications on the maker's site for automatic two-sided printing. Printers with manual duplex print the odd pages first, then ask you to flip and reload the stack.

Automatic duplex usually works only with plain paper in standard sizes and weights. Photo paper, envelopes, labels and card must be printed one side at a time.

On printers with a removable duplex unit or rear door, take it out, check for scraps of paper, and push it back until it clicks. A loose unit can cause one-sided prints or jams.

For manual duplex, make a small pen mark near the top edge of a blank sheet, load it, and print a one-page document. See which side and which end the print landed on, then reload flipped stacks the same way every time.