Canon MG3500 Series Online Manual page 69

Note
Do not overload paper by stacking until the top of the stack touches the paper
guides.
Load small size paper, such as 4" x 6" (10 x 15 cm), by pushing it in all the way
to the back of the front tray.
(5) Open the output tray extension.
3. Open the paper output tray.
(1) Open the paper output tray gently, and extend the paper output support.
69