---
title: selectorIdentifier
framework: appkit
role: symbol
role_heading: Type Property
path: appkit/nsfontdescriptor/featurekey/selectoridentifier
---

# selectorIdentifier

A key that indicates the selector of the font feature.

## Declaration

```swift
static let selectorIdentifier: NSFontDescriptor.FeatureKey
```

## Discussion

Discussion The value of this key is an NSNumber object specifying a font feature selector such as common ligature off, traditional character shape, and so on. For more information on Apple Fonts see Fonts for Apple platforms and the AAT Font Feature Registry.

## See Also

### Feature Keys

- [typeIdentifier](appkit/nsfontdescriptor/featurekey/typeidentifier.md)