Epson PRO Reference Manual page 21

Follow these steps to load special papers and transparencies:
1. Remove the output tray from the top of the paper tray.
2. Slide the left edge guide inside the paper tray to the left as
far as it will go and slide the rear edge guide toward the
front of the printer as far as it will go.
3. Fan a stack of paper; then tap it on a flat surface to even the
edges.
4. Before you load paper, make sure the printable surface is
face down. For coated papers, the printable side is whiter
than the other side. For glossy paper and transparencies,
the printable side is face down when the cut corner is
facing the right outside corner of the paper tray, as shown
in the following illustration.
Paper Handling
1-9