It's common in cards games to have a player choose a card from a deck of cards or from another player. This can be accomplished using Automation Buttons.
To do so:
Add an Automation Button if you haven't already, and click
Edit Button to start editing the button.
Near the top, set the
Popup option to
Show. With this enabled, the player will be shown a popup when pressing the Automation Button.
Within the popup area that appears, click
Add Question and choose
Add "Choose Objects" Question. This will add an area to the popup where the player can select cards.
Choose Cards button that appeared in the last step to show the
Edit Question area. Here you can configure the behavior of this question.
Edit Question area, click
Select Holders... to switch to Selection Mode. This is how you will choose what cards are shown to the player when they click your Automation Button.
Edit Question area, you can also change how cards are ordered in the popup, set a limit to how many cards can be chosen, and show cards face-down for cases where players "pick a card".
Finally, scroll to the bottom of the Automaton steps and add a
Move Objects step. Set the
Objects to Move Setting to
Choose Cards to use the cards selected by the player, and set the
To Holders / Player Seats to where the cards should be moved.