If you’re trying to change the appearance of the “currently selected” button (which resides inside a RG), then the example I provided should help.

It doesn’t matter how many buttons are in the group or if the number of buttons (RG cells) changes. When a button is clicked, just set a custom state to that clicked button. Then, configure a Conditional (on the so-named tab of the Properties panel) to alter the appearance of the currently selected button.

EDIT: And if your button represents a data type called “Calls”, then make your custom state of that type, and when a button is clicked, set the custom state to the “Call” that was just clicked.

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