React · SwiftUI · agent guides
Radio group
One choice from a short list: round wells beside their labels; pressing darkens the well, releasing latches a pip in on the part spring while the old choice's pip drops out (the preset-button interlock).
Use it for
- Two to about six options where every option should be visible at once, and exactly one holds: "Export as PNG · SVG · PDF".
Don't use it for
- On or off (use a switch), several at once (use checkboxes), a long list (use a select), or switching views in place (use a switcher).