Canon PIXMA MX320 Manual page 86

Loading Paper
Slide the Paper Guides (A) to open them, and load the paper in the center of the
(3)
Rear Tray WITH THE PRINT SIDE FACING YOU.
Important
Always load paper in the portrait orientation (B). Loading paper in the landscape
orientation (C) can cause paper jams.
Slide the Paper Guides (A) to align them with both sides of the paper stack.
(4)
Do not slide the Paper Guides too hard. The paper may not be fed properly.
Note
Do not load sheets of paper higher than the Load Limit Mark (D).
Page 86 of 817 pages