# Preview(_:traits:arguments:body:) Creates a group of previews of a parameterized SwiftUI view, varying its inputs over the provided arguments. ``` @freestanding(declaration) macro Preview(_ name: String? = nil, traits: PreviewTrait..., arguments: [T], @ContentBuilder body: @escaping @MainActor (T) -> any View) ``` ## Parameters `name` An optional display name for the preview. If you don’t specify a name, the canvas labels the preview using the line number where the preview appears in source. `traits` Optional instances that customizes the appearance of the preview. `arguments` an array of inputs to pass into the preview’s `body`. `body` A [`ContentBuilder`](/documentation/SwiftUI/ContentBuilder) mapping an argument to a SwiftUI view to preview. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)