When front covers or back covers are required, the settings are usually set in the printer driver, for example. However, you can view and change the settings for the covers via the control panel.
You can change the following settings for both the front cover and the back cover separately.
Enable or disable the use of a cover.
Select the desired media from the media catalog.
Indicate whether the cover must be left empty, printed one-sided, or printed two-sided.
NOTE
You cannot change this setting for the active print job 
.