Besides loading media via the [Load] button in the [Schedule] view, there are 2 ways to open a tray and to load and assign media:
Through the softkey for the [Trays] view at the bottom of the control panel.
Through the paper tray button 
at the right-hand side of the control panel.
In both cases, the control panel displays an overview of the printer and the paper trays. Now you can open a tray, and load and assign media.
This section describes the use of the paper tray button .
IMPORTANT
Make sure that you remove the packaging carefully from the paper because glue stains on the paper can pollute the machine. To prevent pollution, it is advised to remove the first and the last sheet of a pack of paper. In case of pollution of the machine, you must carry out the drum cleaning procedure via the Maintenance section on the control panel.
NOTE
You only have to assign the media to a paper tray when you change the media type for that paper tray. For example, when the paper tray previously contained Normal A4 and you load Coated A4 now. Then you have to assign Coated A4 to that paper tray.
NOTE
You can order all required supplies at your local authorised dealer.
at the right-hand side of the control panel.