Olivetti d-COPIA 255MF Operation Manual page 151

Preparation before Use > Loading paper
2
Adjust the paper length guide to the paper size required.
NOTE
When using 11X17" (Ledger) paper, lower the paper length guide to the left edge of the paper.
3
Adjust the position of the paper width guides located on the left and right sides of the
cassette.
3-19