Epson LQ-300 User Manual page 64

5. Slide the left edge guide of the cut-sheet feeder so it is
aligned with the triangular guide mark. Next, slide the
right edge guide to roughly match the width of your paper.
Slide the paper support midway between the edge guides.
6. Pull the paper-set levers all the way forward until the edge
guides retract and lock open to allow for paper loading.
2-30 Using the Printer