# setGlyphs(_:properties:characterIndexes:font:forGlyphRange:) Stores the initial glyphs and glyph properties for a character range. ``` func setGlyphs(_ glyphs: UnsafePointer, properties props: UnsafePointer, characterIndexes charIndexes: UnsafePointer, font aFont: NSFont, forGlyphRange glyphRange: NSRange) ``` ## Parameters `glyphs` A pointer to the layout manager’s glyph cache. `props` A pointer to a buffer containing glyph properties for the glyphs in the cache. `charIndexes` A pointer to the starting index for the characters in the text storage for which glyphs are generated. `aFont` A font to override the font attributes in the text storage for the specified character range. `glyphRange` The range of glyphs in the glyph cache to set. ## Discussion This method is invoked by text system during the glyph generation process. The only place apps are allowed to call this method directly is from an implementation of the `NSLayoutManagerDelegate` protocol method [`layoutManager(_:shouldGenerateGlyphs:properties:characterIndexes:font:forGlyphRange:)`](/documentation/AppKit/NSLayoutManagerDelegate/layoutManager(_:shouldGenerateGlyphs:properties:characterIndexes:font:forGlyphRange:)). Each array has `glyphRange.length` items. The specified `charIndexes` must be contiguous (no skipped indexes), enabling multiple items to have a same character index (as when one character index generates multiple glyph IDs). Due to font substitution, `aFont` passed into this method might not match the font in the attributes dictionary. Calling this method for a character range that has previously calculated layout information invalidates the layout and display. --- 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)