Canon MF8580Cdw User Manual page 29

4
Align the paper guides against the edges of the paper.
Press the lock release lever and slide the paper guides inward until they are aligned securely against the edges of the paper.
IMPORTANT:
Align the paper guides securely against the edges of the paper
Paper guides that are too loose or too tight can cause misfeeds or paper jams.
5
Insert the paper drawer into the machine.
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Installing the Handset (Optional) (MF8580Cdw / MF8550Cdn / MF8280Cw Only)
Cord
LINKS
Loading Paper
or
Connecting the Power