The front cover sheet should be the same size and orientation as the body paper.
When loading the front cover sheet in the tray, set the relevant paper size.
The front cover sheet cannot be used when a slip sheet is specified.
To print on both sides of the cover sheet, select duplex printing in the printer driver. For details, see Printing on Both Sides of a Page.
For details about setting the front cover sheet function using the PCL 6 printer driver, see Cover/Slip/Designate.
For details about setting the front cover sheet function using the PCL 5c printer driver, see Paper.