Canon 2921B002 On-Screen Manual page 70

Loading Paper
3.
Load paper.
Load the paper stack WITH THE PRINT SIDE FACING DOWN and THE
(1)
LEADING EDGE TO THE FAR SIDE, and align it against the right side of the
Cassette.
Slide the Paper Guide (A) to align with the mark of paper size.
(2)
The Paper Guide (A) will stop when it aligns with the corresponding mark of paper size.
Note
There may be a little space between the Paper Guide (A) and the paper stack.
Slide the Paper Guide (B) on the left to align completely with the side of the
(3)
paper stack.
Note
Do not load higher than the Load Limit Mark (C).
4.
Insert the Cassette into the machine.
Push the Cassette all the way into the machine.
5.
Open the Paper Output Tray gently, and open the Output Tray Extension.
Note
Page 70 of 815 pages