Canon LASER SHOT LBP-1210 User Manual page 38

Insert the envelopes into the cassette, in the direction shown in the
illustration.
➁
➁
➀
If the flap is along the long edge of the envelope, insert envelopes so that
printing side are facing upward with the flap on the left.
If the flap is along the short edge of the envelope, insert envelopes so that
print side are facing upward with the flap toward the printer.
The illustrations below show acceptable and unacceptable arrangements
of the flaps of envelopes in a stack.
Acceptable
The flap of each envelope should be separate, not overlapping the edges
of any of the other envelopes in the stack.
21
Chapter 2 Paper Handling