Selecting Cards From Different Editions in Deck Editor

Hi. I read from previous threads that forge supports choosing different card arts from different editions for the same card and putting them into your decks. I tried to look for the option but I couldn't find it? There is only one entry for every card I search and it has the card art of the most recent printing. I browsed through preferences and I couldn't find a solution. Is there something obvious I'm missing?
Thanks!
Thanks!