To prevent DL and Monarch from being wrinkled, they are recommended to be loaded with the
print-side facing up, flap opened, and facing you.
Note:
When you load the envelopes in the long-edge feed (LEF) orientation, be sure to specify the landscape
orientation on the print driver.
When Loading C5
Load envelopes with the side to be printed on facing up, flap opened, and facing you.
Important:
Never use envelopes with windows, or coated linings. These lead to paper jams and can cause damage to
the printer.
Epson AcuLaser CX17 Series     User’s Guide
Printing Basics     125