Oki C9300 User Manual page 216

4. Fold the tray media size identifier sheet to expose the appropriate
media size, then insert it in the holder at the right end of the tray.
5. Place the appropriate self-adhesive tray number identifier label (2
or 3) supplied with the optional tray on the lower rectangle at the
right side of the tray.
6. Connect the printer interface cable and power cable, then switch
on the printer.
7. Print a MenuMap (see "Printing the MenuMap" on page 29) and
check that the newly added tray(s) now appear under the MEDIA
MENU as Tray2, Tray3.
C9300/C9500 Accessories • 214