Epson Gemini User Manual page 79

2. Lift off the paper tray cover and raise the paper guide roller.
3. Slide the switch to the roller position that matches the paper size you're
4. For 13 × 19-inch paper, release the extension locks and pull out the paper
6-6 Maintaining the System
loading.
Be sure to set the roller in the correct position so it rests on your
paper or you may experience a paper jam.
tray extension completely.
roller switch
paper tray extension