Conditionally display text in Storyline?

I'm using Storyline after a long time of not having access. I'm creating an activity where a user chooses cards to keep and cards to discard. I want to list only the names of the cards in the Keep pile.

I had thought of using variables and states, but I don't want blank spaces to show if that card is not displayed. I seem to remember there was a way to slide text over to fill blank spaces, but I can't remember how, and I've been searching through with keywords like "conditionally display text," etc., without finding what I'm looking for. Can someone point me in the right direction?

Thanks!