Specifies the duplex mode to use for the print job.
- iOS 4.2+
- Mac Catalyst 13.0+
Some printers can print either duplex (double-sided) or single-sided. If double-sided is selected, a printer can either print flipping the back page along the long edge of the paper or along the short edge. The default option for duplex-capable printers is based on document type: single-sided (none) for photos, double-sided and long edge for other documents. If a printer is capable of duplex printing, a switch in the printing options allows users to toggle between single-side and double-sided printing. See the description of the
UIPrint constants for more information.