Epson Y465ss127mo - Manual (Page 47)

7. Slide the right sprocket unit to a position where the paper is straight
and has no wrinkles, and then lock it into place.
Note: Make sure the first sheet of paper has a clean, straight edge so
that the paper can feed smoothly into the printer.
8. Reattach the paper guide. Then slide the edge guides together so that
they meet at about the middle of the paper’s width.
2-10 Paper Handling