Canon PIXMA iP3000 Series Quick Start Manual page 14

Basic Printing
4
Insert the Cassette into the printer.
If the Cassette had been extended to accommodate paper sizes larger
than 5"x7", the front edge of the cassette will extend beyond the front of
the printer.
10
(1) Set the Cover on the
Cassette.
(2) Insert the Cassette into the
printer.
Push the Cassette all the way
into the printer.