I'm sorry if this is going in the wrong board, but I was wondering how to search for a card in your main deck since they are naturally set face down. I'm not sure if it applies to all games, but I'm playing megaman and I don't know how I would search my deck for a virus when I play one down.
If you set your deck to be in the right hand column, there is a button just below that column that switches it to visible.