---
title: "previewLayout(_:)"
framework: swiftui
role: symbol
role_heading: Instance Method
path: "swiftui/view/previewlayout(_:)"
---

# previewLayout(_:)

Overrides the size of the container for the preview.

## Declaration

```swift
nonisolated func previewLayout(_ value: PreviewLayout) -> some View

```

## Parameters

- `value`: A layout to use for preview.

## Return Value

Return Value A preview that uses the given layout.

## Discussion

Discussion By default, previews use the PreviewLayout/device layout, which places the view inside a visual representation of the chosen device. You can instead tell a preview to use a different layout by choosing one of the PreviewLayout values, like PreviewLayout/sizeThatFits: struct CircleImage_Previews: PreviewProvider {     static var previews: some View {         CircleImage()             .previewLayout(.sizeThatFits)     } }

## See Also

### Customizing a preview

- [previewDevice(_:)](swiftui/view/previewdevice(_:).md)
- [PreviewDevice](swiftui/previewdevice.md)
- [previewInterfaceOrientation(_:)](swiftui/view/previewinterfaceorientation(_:).md)
- [InterfaceOrientation](swiftui/interfaceorientation.md)