Epson CX6500 Reference Manual page 176

Follow the on-screen instructions to reload the
paper.
Note:
The paper may curl during printing due to the amount of ink used. Should this
occur, slightly curl the sheets in the opposite direction before reloading them into
the sheet feeder.
Align the sheet stack by tapping its edges against a hard, flat surface before
reloading the stack into the sheet feeder.