You can use the paper tray button at the right-hand side of the control panel to check the media that are loaded in the paper trays. You can assign media in the Trays view after you load the media in the paper tray. As long as the media type in the paper tray does not change, it is not necessary to assign the media after loading.
You can also use the [Trays] button.
Determine which media the jobs need.
Make sure you know how to load media into the paper trays. (Load and store media, Load envelopes and tab paper)
Only the media that are allowed for the selected paper tray are displayed.