# Deprecated Review deprecated preview symbols and their replacements. ## Topics ### Defining a preview [`protocol PreviewProvider`](/documentation/SwiftUI/PreviewProvider) A type that produces view previews in Xcode. [`enum PreviewPlatform`](/documentation/SwiftUI/PreviewPlatform) Platforms that can run the preview. [`func previewDisplayName(String?) -> some View`](/documentation/SwiftUI/View/previewDisplayName(_:)) Sets a user visible name to show in the canvas for a preview. ### Customizing a preview [`func previewDevice(PreviewDevice?) -> some View`](/documentation/SwiftUI/View/previewDevice(_:)) Overrides the device for a preview. [`struct PreviewDevice`](/documentation/SwiftUI/PreviewDevice) A simulator device that runs a preview. [`func previewLayout(PreviewLayout) -> some View`](/documentation/SwiftUI/View/previewLayout(_:)) Overrides the size of the container for the preview. [`func previewInterfaceOrientation(InterfaceOrientation) -> some View`](/documentation/SwiftUI/View/previewInterfaceOrientation(_:)) Overrides the orientation of the preview. [`struct InterfaceOrientation`](/documentation/SwiftUI/InterfaceOrientation) The orientation of the interface from the user’s perspective. ### Setting a context [`func previewContext(C) -> some View`](/documentation/SwiftUI/View/previewContext(_:)) Declares a context for the preview. [`protocol PreviewContext`](/documentation/SwiftUI/PreviewContext) A context type for use with a preview. [`protocol PreviewContextKey`](/documentation/SwiftUI/PreviewContextKey) A key type for a preview context. --- 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)