Solutions
If paper is ejected in an unexpected direction when landscape pages and portrait pages are mixed, or 2-sided printing and 1-sided printing are mixed, enable the Output documents for filing setting in the printer driver. This ejects pages in the same direction for easy filing.
Windows
Select Output documents for filing in Extended Settings on the Maintenance tab.
Mac OS
Select System Preferences from the Apple menu > Printers & Scanners (or Print & Scan, Print & Fax), and then select the printer. Click Options & Supplies > Options (or Driver). Select On as the Output documents for filing setting.