Epson Stylus Pro 4000 Printer Manual page 23

Note: When you add
paper, always line up the
edges with the remaining
paper in the tray.
7. Load the sheets with the printable side down, in the portrait orientation
(short edge first). Place the paper all the way back in the paper tray and
next to the right edge.
Make sure the stack of paper fits under the arrow on the left edge guide.
8. Adjust the edge guide and length of the paper tray.
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Handling Paper and Other Media | 23