Epson WorkForce WF-7510 User Manual page 41

Note: Make sure the envelopes fit beneath the top edges of the guide.
Caution: To prevent paper feeding problems, make sure you do not load too many envelopes in the
cassette.
7. Gently replace the paper cassette cover and insert the paper cassette.
Note: The envelopes may slide forward slightly as you insert the cassette. This is normal.
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