Epson FX-870 User Manual page 86

Cut-Sheet Feeders
2. Slide the left paper guide so it is aligned with the triangle mark.
Next, slide the right paper guide to roughly match the width of
your paper. Slide the paper support midway between the paper
guides.
3. Pull the paper-set levers all the way forward until the paper
guides retract and lock open.
4. Take a stack of paper and fan it. Next, tap the side and bottom of
the paper on a flat surface to even up the stack.
4-4 Using the Printer Options