Epson EPL-N4000 Hardware Setup Manual page 19

5. Adjust the vertical and horizontal paper guides to match the
size of your paper.
Caution:
c
Make sure to adjust the paper guides to the paper size you
load; otherwise, the printer will not print properly.
6. Take out the card with paper sizes printed on it. Fold it
appropriately and insert it into the cassette to show the paper
size that you loaded.
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