Specify Sockets for Deckbuilding

[Neokarasu]

How do you specify the sockets used for relevant cards during deckbuilding? I see that it's possible as seen on this deck: http://hex.tcgbrowser.com/#!/deck=22566, but I can't figure out how to do it. It's probably something really simple I missed.

[bogycoins]

It's really simple. Add a socketed card to the deck, then open the card and click on the socket area. A small window with available gems should open and you can select the gem you want.

[Neokarasu]

Aha! I knew it was going to be so simple...

Thanks!