Epson DLQ-3500 User Manual page 128

4. Slide the center support midway between the paper guides.
5. Fan a stack of paper, and tap the sides and bottom of the stack
on a flat surface to even it up.
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6. Insert the paper along the right paper guide and adjust the
position of the left paper guide so that it matches your paper's
width. Make sure the position of the guide allows the paper
to move up and down freely. Then lock the left guide in place.
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Caution:
Do not load labels to the cut-sheet feeder.