Canon Pixma MP520 series Quick Start Manual page 15

If You Print Regularly on Photo Paper as well as on Plain Paper
If you use photo paper as much as plain paper, you can load photo paper in the Rear Tray and
plain paper in the Front Tray. This way, you can switch the paper source according to the type of
paper just by pressing the Paper Feed Switch.
Note
You cannot load paper other than A4, Letter, or B5-sized plain paper in the Front Tray. When using
any other type of paper, load it in the Rear Tray. For details on loading paper, see "Loading Paper"
on page 13.
(B)
(A) Rear Tray: Load paper of various types and sizes, including photo paper
(B) Front Tray: Load A4, Letter, or B5-sized plain paper
(A)
Before Using the Machine 11