Canon MF8580Cdw Manual page 530

Rough Paper Settings
When printing on rough paper, especially when color images are printed too light, select <On>. You can specify the settings
separately for each paper source.
Multi-Purpose Tray
Off
On
Drawer 1
Off
On
*
Drawer 2
Off
On
<Rough Paper Settings>
Envelope Cling Prevention
If envelope flaps cling to the envelope bodies when printing, select <On>.
Off
On
<Envelope Cling Prevention>
Envelope Switch
Adjust this setting if envelope printouts are light, or envelopes do not feed smoothly.
Envelope 1
Envelope 2
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<Adjustment/Maintenance>
Select the paper source
<Adjustment/Maintenance>
<Special Processing>
<On>
<Special Processing>
<On>
<Special Paper Processing>
<Special Paper Processing>