Canon Cd printer Print Manual page 8

When removing the 8cm CD-R, remove the adapter first, and then remove the disc from the tray.
Removing the CD-R tray feeder
6
1 1 1 1
Hook your fingers inside the groove on
the slider, and pull the slider in the
direction of the arrow.
2 2 2 2
Remove the CD-R tray feeder from the
printer.
Be sure to perform steps 1 and 2 in order when
removing the CD-R tray feeder. Performing them at
once may result in damage to the CD-R tray feeder.