Epson B 310N - Manual (Page 113)

Installing Options 113
2. Remove the duplex unit by pulling it while holding down the buttons on both sides of the
duplex unit.
3. Attach the upper rear printer cover.
Optional Legal-size Paper Cassette
Installing the Optional Legal-size Paper Cassette
Gently insert the legal-size paper cassette into the front of the printer, underneath the
paper output tray. The legal-size paper cassette extends past the edge of the paper output
tray when installed correctly.