Canon imageRUNNER C3489 Reference Manual page 341

NOTE
If a message prompting you to load paper appears during printing, the remaining prints
are automatically made after you load the correct paper. If you select another paper
source, the remaining prints are made after you press [OK].
1
Press the open button to open the paper deck.
The inside lifter automatically descends to the paper loading position.
2
Open a package of paper, and remove the paper stack.
CAUTION
When loading paper, take care not to cut your hands on the edges of the
paper.
Paper Deck-Z1 (Optional)
7
7-11