Ricoh Aficio SP C811DN Hardware Manual page 111

4. Adjust the side guides to fit the paper width.
5. Press the [Menu] key.
6. Press the [ ] or [ ] key to select [Paper Input], and then press the [OK] key.
7. Press the [ ] or [ ] key to select [Paper Size: Bypass], and then press the [OK] key.
8. Select the paper size you want to set using the scroll keys, and then press the [OK] key.
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