---
title: kCTKernAttributeName
framework: coretext
role: symbol
role_heading: Global Variable
path: coretext/kctkernattributename
---

# kCTKernAttributeName

The amount to kern the next character.

## Declaration

```swift
let kCTKernAttributeName: CFString
```

## Discussion

Discussion The value associated with this attribute must be a CFNumber float. Default is standard kerning. The kerning attribute indicates how many points the following character should be shifted from its default offset as defined by the current character’s font in points: a positive kern indicates a shift farther away from and a negative kern indicates a shift closer to the current character. If this attribute is not present, standard kerning is used. If this attribute is set to 0.0, no kerning is done at all.

## See Also

### Constants

- [kCTCharacterShapeAttributeName](coretext/kctcharactershapeattributename.md)
- [kCTFontAttributeName](coretext/kctfontattributename.md)
- [kCTLigatureAttributeName](coretext/kctligatureattributename.md)
- [kCTForegroundColorAttributeName](coretext/kctforegroundcolorattributename.md)
- [kCTForegroundColorFromContextAttributeName](coretext/kctforegroundcolorfromcontextattributename.md)
- [kCTParagraphStyleAttributeName](coretext/kctparagraphstyleattributename.md)
- [kCTStrokeWidthAttributeName](coretext/kctstrokewidthattributename.md)
- [kCTStrokeColorAttributeName](coretext/kctstrokecolorattributename.md)
- [kCTSuperscriptAttributeName](coretext/kctsuperscriptattributename.md)
- [kCTUnderlineColorAttributeName](coretext/kctunderlinecolorattributename.md)
- [kCTUnderlineStyleAttributeName](coretext/kctunderlinestyleattributename.md)
- [kCTVerticalFormsAttributeName](coretext/kctverticalformsattributename.md)
- [kCTGlyphInfoAttributeName](coretext/kctglyphinfoattributename.md)
- [kCTRunDelegateAttributeName](coretext/kctrundelegateattributename.md)
- [kCTBaselineOffsetAttributeName](coretext/kctbaselineoffsetattributename.md)