Epson 3260 - Manual (Page 54)

2. Replace the cover.
Envelopes
You can use the manual insertion slot to print on individual
envelopes.
Before loading an envelope, set the paper-thickness lever to
position 2 and lower the flap on the printer’s rear.
Always load envelopes manually through the rear slot. To
load an envelope, follow the steps described in ‘Loading
paper manually’ earlier in this chapter.
Always feed envelopes by inserting the wide edge into the
printer first, as shown.
Use envelopes under normal temperature and humidity
conditions.
2-16 Paper Handling