Epson 24-Pin User Manual page 173

2. Pull the lock levers on the edge guides forward to release
them.
3. Slide the left paper guide until it is aligned with the triangle
mark; then lock it in place by pushing back its lock lever. Next,
slide the right paper guide to roughly match the width of your
paper. Slide the paper support to midway between the paper
guides.
Enhancing Your Printer With Options
A
A-13