Epson 5000 - Manual (Page 45)

3. Slide the edge guide until you feel it click into place at the
guide mark. You can slide the edge guide to the left in
1/l0-inch increments to increase the size of the left margin
on your paper.
4. While aligning the paper’s left edge with the edge guide,
insert the paper firmly until it meets resistance; after a few
seconds, the printer automatically loads the paper to the
loading position.
Paper Handling 2-7