User`s guide

6. Slide the edge guide to the left so it is slightly wider than the width of your paper.
7. Fan a stack of paper, and then tap it on a flat surface to even the edges.
If the paper is curled, flatten it before you load it. If it curls excessively and jams frequently,
stop using it.
Epson Stylus Pro 3880 User’s Guide
Paper Handling 151