Canon imageCLASS 2300 Reference Manual page 134

7
Attach the appropriate paper size label onto the paper size
plate.
Remove the protecting plastic sheet and attach the label for the paper size you
are loading.
LTR
8
Change the paper size plate, so that it matches the new paper
size being loaded.
9
Gently push the paper drawer back into the machine until it
clicks into place in the closed position.
Paper Drawers 6-9
6