On the Advanced tab.
Select the PostScript language level to use for printing. It is usually best to select the highest level available in order to enable more features. Your Xerox® printer is PostScript Level 3.
You may want to select a lower level when troubleshoot printing problems or archiving documents so they can be printed on a printer that has that lower language level. Printing errors may occur if you select PostScript Language Level 2 when the document is longer than one page.