how could I make the forge show the cover of my deck?

Who can tell me how can I make the forge show the cover of my deck? thanks.
[img]
[/img]


[/img]
High Quality Resources for Collectible Card Games
https://www.slightlymagic.net/forum/
https://www.slightlymagic.net/forum/viewtopic.php?f=26&t=18359