Fuji Xerox DocuPrint M255 z User Manual page 360

Problem
Print media does not stack neatly
in the center output tray.
Printer does not duplex pages.
360 Troubleshooting
Action
Turn the print media stack over in the Priority Sheet Inserter (PSI) and
the paper tray.
Select Flip on Short Edge or Flip on Long Edge from the Duplex
menu on the Paper/Output tab of the print driver.