---
title: "init(layoutSize:elementKind:containerAnchor:)"
framework: uikit
role: symbol
role_heading: Initializer
path: "uikit/nscollectionlayoutsupplementaryitem/init(layoutsize:elementkind:containeranchor:)"
---

# init(layoutSize:elementKind:containerAnchor:)

Creates a supplementary item of the specified size and element kind, with an anchor relative to a container.

## Declaration

```swift
convenience init(layoutSize: NSCollectionLayoutSize, elementKind: String, containerAnchor: NSCollectionLayoutAnchor)
```

## See Also

### Creating a supplementary item

- [init(layoutSize:elementKind:containerAnchor:itemAnchor:)](uikit/nscollectionlayoutsupplementaryitem/init(layoutsize:elementkind:containeranchor:itemanchor:).md)