Epson 2500 - Manual (Page 44)

38 Printing
Printing on Envelopes
You can print on almost any kind of envelope. Load up to
10 envelopes in the printer’s sheet feeder, flap edge first, with
the flap side down. Slide the left edge guide against the
envelope’s edge.
Set the paper thickness switch to the + position. (Return the
switch to the 0 position before you print on regular paper.)
note:
Be sure to select Plain
paper as the Media Type
setting and select the
correct envelope size
before you print.
paper thickness switch