Rule 424.4.a

While cards are Revealed, those cards can be further manipulated, or accessed. They can even have their destination modified for when the Reveal ends. Example: "Reveal 2 cards from the top of your Main Deck. Put one into your hand and Recycle the other" would be executed by taking the top two cards from your Main Deck, presenting them to the table, and once every player present has had a chance to understand them you would make the selection of one of them to add to your hand. The one you did not select would then be Recycled to the bottom of the Main Deck.