To make a new deck, go to deck edit. One the right will be an area next to "save as". Clear the current deck, type in a name, hit save as to make a new deck save. To add cards, type in the 8-digit code at the bottom of your yugiou cards, just like in the handheld version. After you are done making your deck, hit "save". NOW. in versions 1023 and up, you can type in the card name instead.