Oki C9800hdn User Manual page 27

4. Fan the paper to be loaded then tap the edges of the stack on
a flat surface to make it flush.
5. Load the paper.
> For single-sided printing on letterhead, load the paper into
the multi-purpose tray with pre-printed side up and top
edge into the printer.
> For two-sided (duplex) printing on letterhead, load the
paper with pre-printed side down and top edge away from
the printer.
> Envelopes should be loaded face-up with long edge into
the printer. Do not select duplex printing on envelopes.
> Do not leave space between the paper and the guides.
> Do not exceed the paper capacity of approximately 230
sheets, 100 transparencies or 25 envelopes. Maximum
stacking depth is 1in.
C9800 User's Guide> 27