Kyocera TASKalfa 2552ci - Manual (Page 156)

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Preparation before Use > Loading Paper
4
Attach the envelope feed guide as shown in the illustration.
The illustration below shows that the lever of the envelope feed guide is expanded.
5
Adjust the paper length guide to the paper size required.
6
Adjust the position of the paper width guides located on the left and right
sides of the cassette.