Epson LQ-300 User Manual page 45

3. Slide the left sprocket unit using the scale on the printer as a
guide. The printer prints to the right of the position marked 0.
Push the sprocket lock lever back to lock it in place. Then
slide the right sprocket unit to match the width of your
paper, but do not lock it. Move the paper support so it is
midway between the sprocket units.
2-9
Using the Printer