Oki MB472dn User Manual page 432

Loading Envelopes
This section describes how to load envelopes in the MP tray.
1.
Open the MP tray.
2.
Pull the paper support out.
3.
Open the sub support.
4.
Adjust the manual feeding paper guide to the width of an envelope to be loaded.
5.
Load an envelope with the print side up until its edge touches the paper feed entrance.
Note
Do not load envelopes above the " " mark.
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