---
title: NSTrackingAttributeName
framework: appkit
role: symbol
role_heading: Global Variable
path: appkit/nstrackingattributename
---

# NSTrackingAttributeName

The amount to modify the default tracking.

## Declaration

```occ
extern NSAttributedStringKey NSTrackingAttributeName;
```

## Overview

Overview The value of this attribute is an NSNumber object containing a floating-point value. The value represents the amount of space, in points, to add between the specified characters. A positive value increases the spacing between characters, and a negative value brings the characters closer together. Specify 0 to disable tracking. The effect of this attribute is similar to the effect of NSKernAttributeName, but the system treats tracking as trailing whitespace. A nonzero amount of tracking disables nonessential ligatures, unless the NSLigatureAttributeName attribute is present.

## See Also

### Getting rendering attribute keys

- [NSBackgroundColorAttributeName](appkit/nsbackgroundcolorattributename.md)
- [NSBaselineOffsetAttributeName](appkit/nsbaselineoffsetattributename.md)
- [NSFontAttributeName](appkit/nsfontattributename.md)
- [NSForegroundColorAttributeName](appkit/nsforegroundcolorattributename.md)
- [NSGlyphInfoAttributeName](appkit/nsglyphinfoattributename.md)
- [NSKernAttributeName](appkit/nskernattributename.md)
- [NSLigatureAttributeName](appkit/nsligatureattributename.md)
- [NSParagraphStyleAttributeName](appkit/nsparagraphstyleattributename.md)
- [NSStrikethroughColorAttributeName](appkit/nsstrikethroughcolorattributename.md)
- [NSStrikethroughStyleAttributeName](appkit/nsstrikethroughstyleattributename.md)
- [NSStrokeColorAttributeName](appkit/nsstrokecolorattributename.md)
- [NSStrokeWidthAttributeName](appkit/nsstrokewidthattributename.md)
- [NSSuperscriptAttributeName](appkit/nssuperscriptattributename.md)
- [NSUnderlineColorAttributeName](appkit/nsunderlinecolorattributename.md)
- [NSUnderlineStyleAttributeName](appkit/nsunderlinestyleattributename.md)