How to scavenge in Forge

[Greeneye]

I can see the cards in my graveyard, but I'm not sure how to play cards from the graveyard. the only option I see is ok and cancel.

What am I missing?

[Xyx]

Click the icon that looks like a lightning bolt to play cards from zones other than hand or battlefield (like flashback, unearth or from the top of your library with Courser of Kruphix and stuff).