---
title: NSCollectionView.SupplementaryElementKind
framework: appkit
role: symbol
role_heading: Type Alias
path: appkit/nscollectionview/supplementaryelementkind
---

# NSCollectionView.SupplementaryElementKind

## Declaration

```swift
typealias SupplementaryElementKind = String
```

## See Also

### Creating Collection View Items

- [makeItem(withIdentifier:for:)](appkit/nscollectionview/makeitem(withidentifier:for:).md)
- [register(_:forItemWithIdentifier:)](appkit/nscollectionview/register(_:foritemwithidentifier:)-6s4i.md)
- [register(_:forItemWithIdentifier:)](appkit/nscollectionview/register(_:foritemwithidentifier:)-90h1i.md)
- [makeSupplementaryView(ofKind:withIdentifier:for:)](appkit/nscollectionview/makesupplementaryview(ofkind:withidentifier:for:).md)
- [register(_:forSupplementaryViewOfKind:withIdentifier:)](appkit/nscollectionview/register(_:forsupplementaryviewofkind:withidentifier:)-3dqa.md)
- [register(_:forSupplementaryViewOfKind:withIdentifier:)](appkit/nscollectionview/register(_:forsupplementaryviewofkind:withidentifier:)-7gvf2.md)
- [NSUserInterfaceItemIdentifier](appkit/nsuserinterfaceitemidentifier.md)