Print by Source to specify a tray from which the printer will pull media. The printer tries to print from this tray, no matter what type or size is loaded in it. If you select a tray that is configured for a type or size that does not match your print job, the job does not proceed until you load the tray with the correct type or size. If you load the tray correctly, the printer begins printing. If you press , you can select another tray.
If you have difficulties printing by Source, see Priority for print settings.