Epson FX-870 User Manual page 50

Using Continuous Paper
7. Slide the left sprocket unit approximately 12 mm (0.5 inch) from
the far left position. Push the sprocket lock 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.
12 mm (0.5 inch)
8. Pull the paper up until the perforation between the first and
second pages is even with the top of the printer's ribbon.
Paper Handling 2-17