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

# init(layoutSize:elementKind:containerAnchor:itemAnchor:)

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

## Declaration

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

## See Also

### Creating a supplementary item

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