Canon PIXMA Pro9000 Series Quick Start Manual page 18

Basic Printing
Returning the Front Tray to Its Normal Printing Position
When using the Auto Sheet Feeder, set the Front Tray to its normal printing position.
1
Hold the Front Tray and slowly tilt it like you are closing it.
2
Open the Front Tray.
14
Be sure to follow the procedure below when returning the Front Tray to
its normal printing position. Otherwise, the printer may be damaged.
When the Front Tray is set to the Front Paper Feeding Position, printing
by using the Auto Sheet Feeder is not possible. Be sure to set it to its
normal printing position.
Tilting the Front Tray lowers it to
its normal printing position.
(1) Open the Front Tray to return it
to its normal printing position.
(2) Ensure that the FRONT FEED
button is not lit.