The paper tray is automatically detected when paper
                  is loaded in the inserter.
If you need to specify a paper tray when, for example, paper
                  has been loaded into both the upper and lower trays on the inserter,
                  tap the [Upper Tray] or [Lower Tray] key to specify the appropriate
                  paper tray.

Version 04a / bp70m90_usr_04a_en