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.
If the [Automatically unassign media from opened tray] setting is enabled, you need to reassign the media every time you open the paper tray.
You can also use the [Trays] button.
Determine which media the jobs need.
Only the media that are allowed for the selected paper tray are displayed.