Epson ACULASER M8000 series - Manual (Page 37)

8. Load a stack of the desired paper on the center of the paper cassette with the printable surface
facing up.
Note:
Make sure that you do not load paper beyond the limit mark.
9. Insert the paper size label into the front of the paper cassette.
10. Replace the tray cover.
EPSON AcuLaser M8000 Series User's Guide
Printing Tasks 37