# Text Attributed-String Attributes and Constants Attributes and key constants used with attributed strings. ## Topics ### Constants [`extern NSAttributedStringKey const NSAccessibilityAttachmentTextAttribute;`](/documentation/AppKit/NSAccessibilityAttachmentTextAttribute) Text attachment (`id`). [`extern NSAttributedStringKey const NSAccessibilityAutocorrectedTextAttribute;`](/documentation/AppKit/NSAccessibilityAutocorrectedTextAttribute) Autocorrected text (`NSNumber` as a Boolean value). [`extern NSAttributedStringKey const NSAccessibilityBackgroundColorTextAttribute;`](/documentation/AppKit/NSAccessibilityBackgroundColorTextAttribute) Text background color (`CGColorRef`). [`extern NSAttributedStringKey const NSAccessibilityForegroundColorTextAttribute;`](/documentation/AppKit/NSAccessibilityForegroundColorTextAttribute) Text foreground color (`CGColorRef`). [`extern NSAttributedStringKey const NSAccessibilityUnderlineColorTextAttribute;`](/documentation/AppKit/NSAccessibilityUnderlineColorTextAttribute) Text underline color (`CGColorRef`). [`extern NSAttributedStringKey const NSAccessibilityStrikethroughColorTextAttribute;`](/documentation/AppKit/NSAccessibilityStrikethroughColorTextAttribute) Text strikethrough color (`CGColorRef`). [`extern NSAttributedStringKey const NSAccessibilityUnderlineTextAttribute;`](/documentation/AppKit/NSAccessibilityUnderlineTextAttribute) Text underline style (`NSNumber`). [`extern NSAttributedStringKey const NSAccessibilitySuperscriptTextAttribute;`](/documentation/AppKit/NSAccessibilitySuperscriptTextAttribute) Text superscript style (`NSNumber`). Values > 0 are superscript; values < 0 are subscript. [`extern NSAttributedStringKey const NSAccessibilityStrikethroughTextAttribute;`](/documentation/AppKit/NSAccessibilityStrikethroughTextAttribute) Text strikethrough (`NSNumber` as a Boolean value). [`extern NSAttributedStringKey const NSAccessibilityShadowTextAttribute;`](/documentation/AppKit/NSAccessibilityShadowTextAttribute) Text shadow (`NSNumber` as a Boolean value). [`extern NSAttributedStringKey const NSAccessibilityLinkTextAttribute;`](/documentation/AppKit/NSAccessibilityLinkTextAttribute) Text link (`id`). [`extern NSAttributedStringKey const NSAccessibilityMarkedMisspelledTextAttribute;`](/documentation/AppKit/NSAccessibilityMarkedMisspelledTextAttribute) Misspelled text that is visibly marked as misspelled (`NSNumber` as a Boolean value). If you’re implementing a custom text-editing app, use `NSAccessibilityMarkedMisspelledTextAttribute` to ensure that VoiceOver properly identifies misspelled text to users. [`extern NSAttributedStringKey const NSAccessibilityMisspelledTextAttribute;`](/documentation/AppKit/NSAccessibilityMisspelledTextAttribute) Misspelled text that isn’t necessarily visibly marked as misspelled (`NSNumber` as a Boolean value). [`extern NSAttributedStringKey const NSAccessibilityFontTextAttribute;`](/documentation/AppKit/NSAccessibilityFontTextAttribute) Font keys (`NSDictionary`). [`static let fontName: NSAccessibility.FontAttributeKey`](/documentation/AppKit/NSAccessibility-swift.struct/FontAttributeKey/fontName) A required key for a font name. [`static let fontFamily: NSAccessibility.FontAttributeKey`](/documentation/AppKit/NSAccessibility-swift.struct/FontAttributeKey/fontFamily) An optional key for a font family. [`static let visibleName: NSAccessibility.FontAttributeKey`](/documentation/AppKit/NSAccessibility-swift.struct/FontAttributeKey/visibleName) An optional key for font visibility. [`static let fontSize: NSAccessibility.FontAttributeKey`](/documentation/AppKit/NSAccessibility-swift.struct/FontAttributeKey/fontSize) A required key for a font size. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)