Canon LBP7018C E-Manual page 295

Perform the following procedure in the printer driver.
1. Display the [Finishing] sheet.
2. Click [Advanced Settings].
3. Set [Special Print Mode] to [Special Settings C3].
Solution 2
If the problem is not improved, specify [Special Settings D2].
Normally, use the printer with [Special Print Mode] set to [Off]. Change the settings only if the
described problems occur.
If you specify [Special Settings D2], printing speed drops.