---
title: "setCompositionAspectRatio(_:)"
framework: quartz
role: symbol
role_heading: Instance Method
path: "quartz/qccompositionpickerview/setcompositionaspectratio(_:)"
---

# setCompositionAspectRatio(_:)

Sets  the aspect ratio used to display compositions in the composition picker view.

## Declaration

```swift
func setCompositionAspectRatio(_ ratio: NSSize)
```

## Parameters

- `ratio`: An aspect ratio.

## See Also

### Managing the Composition Picker View

- [setCompositionsFromRepositoryWithProtocol(_:andAttributes:)](quartz/qccompositionpickerview/setcompositionsfromrepositorywithprotocol(_:andattributes:).md)
- [compositions()](quartz/qccompositionpickerview/compositions().md)
- [setAllowsEmptySelection(_:)](quartz/qccompositionpickerview/setallowsemptyselection(_:).md)
- [allowsEmptySelection()](quartz/qccompositionpickerview/allowsemptyselection().md)
- [compositionAspectRatio()](quartz/qccompositionpickerview/compositionaspectratio().md)
- [setSelectedComposition(_:)](quartz/qccompositionpickerview/setselectedcomposition(_:).md)
- [selectedComposition()](quartz/qccompositionpickerview/selectedcomposition().md)