Zebra: ZT411R: Adjust Print Darkness To adjust the print darkness on your ZT411 printer, take the following steps: On the home screen of the printer, tap the  Menu button Tap the  Print icon, then Print Quality , then select the  Darkness  option Adjust the darkness setting using the slider or  +  and  -  buttons. The darkness setting ranges from  0  to  30 . For  wax ribbon , the recommended darkness setting is 10-15 . For  resin ribbon , the recommended darkness setting is  25-30 . After adjusting the darkness, tap the  Home button at the top-right of the screen to return to the home screen.