On the printer load your media with the correct media type.   Then go to Maintenance, then Paper Feed Adjustment, then "Print Alignment Pattern".  This will print a ruler out that is 30 inches in length.   Use a measuring tape to see how far off the printer is feeding.  It will ask you for the adjustment amount in percentage.  The easiest way to adjust is to know that +.26 = 1/16th of an inch on that chart.   You can make your adjustments based on that math and then reprint the ruler and dial it back or forth from there.   Once you are spot on leave it and those settings will be applied anytime that media type is used.