Canon PIXMA iP6000D Printing Manual page 17

Loading paper in both the sheet feeder and cassette makes the following paper feed
methods available:
• Changing the paper source to feed different types/sizes of paper
If you load plain paper in the cassette and photo paper in the sheet feeder, changing
the paper source allows you to print on both types of paper without removing and
reloading paper. To change the paper source, use the paper feed switch on the
printer.
• Choosing the paper source to match the location of the printer
You can use just the sheet feeder or cassette according to the location of the printer.
For example, if you intend to install the printer in a small place, such as on a shelf
with minimal space, you can use just the cassette for printing.
Caution You cannot load sticker paper in the cassette. Load one sheet at a time
in the sheet feeder.
Depending on the size of paper you use or during printer maintenance,
Note
you may have to use the sheet feeder. When using only the cassette,
check that the printer can perform the operations you require.
16