Insert the envelopes one at a time into the MP tray, in the direction shown
in the illustration.
If the ﬂap is along the long edge of the envelope, insert each envelope
with the ﬂap at the back and on the right.
If the ﬂap is along the short edge of the envelope, insert envelopes with
the ﬂap at the bottom and at the back.
The illustrations below show acceptable and unacceptable arrangements
of the ﬂaps of envelopes in a stack.
The ﬂap of each envelope should be separate, not overlapping the edges
of any of the other envelopes in the stack.