Choice Groups
In the Previewer workspace, you can configure a Choice Groups to be a:
- Radio Buttons Group
- or a Dropdown
The Choice Group option items go in another Card (its Entries are the options). That options Card can be reused for many Choice Groups.
Default Selection
Choice Groups can be empty or pre-selected by default.

Alternative for Multi-Selection
As multi-selection is not possible with Choice Groups, an alternative could be a Card with Checkboxes.

Chained Choice Groups
The options Card can be dynamically changed based on the selection of another Choice Group. For this, the chained Choice Groups need to live in the same Card.
Formulas
Lastly, Choice Groups can be used in Formulas.