There is now a way to “mark” cards in a stack so you can print only certain cards, or show certain cards, or have some change occur only on certain cards.
You mark cards through HyperTalk with the “mark” command:
There is also a “This card is marked” checkbox in the Card Info dialog box. If you mark a card through a script, this box will be checked, or you can check it yourself.
You can also move through marked cards one at a time: