# GlyphsCore *Framework* The Core API, usable from Objective-C, Swift, and Python. ## Overview This is the API documentation for the classes used in Glyphs. ## Topics ### Essentials - [`GSFont`](/Core/GlyphsCore/GSFont) — The top-level model object of a Glyphs document. - [`GSGlyph`](/Core/GlyphsCore/GSGlyph) — A named glyph and its layer collection in a font. - [`GSLayer`](/Core/GlyphsCore/GSLayer) — The drawing and editing representation of a glyph. - [`GSAxis`](/Core/GlyphsCore/GSAxis) — `GSAxis` represents an axis in a `GSFont` object. - [`GSFontMaster`](/Core/GlyphsCore/GSFontMaster) - [`GSInstance`](/Core/GlyphsCore/GSInstance) ### Shapes - [`GSShape`](/Core/GlyphsCore/GSShape) — An abstract base class for graphical elements stored in a glyph layer. - [`GSPath`](/Core/GlyphsCore/GSPath) — A graphical path made of nodes. - [`GSComponent`](/Core/GlyphsCore/GSComponent) — A reference to another glyph placed as a shape in a glyph layer. - [`GSShapeGroup`](/Core/GlyphsCore/GSShapeGroup) — A shape group combines zero or more shapes into a single shape, forming a shape tree. ### Layout Features - [`GSFeaBlock`](/Core/GlyphsCore/GSFeaBlock) — A snippet of feature code. - [`GSFeaturePrefix`](/Core/GlyphsCore/GSFeaturePrefix) — The class defining the Prefix object - [`GSClass`](/Core/GlyphsCore/GSClass) — The class represents the OpenType classes - [`GSFeature`](/Core/GlyphsCore/GSFeature) — The class defining the feature object ### Concepts - [Layout and Writing Direction](/Core/GlyphsCore/Layout-and-Writing-Direction) — A resolved combination of character and line directions. ### Pens - [`GSBasePen`](/Core/GlyphsCore/GSBasePen) - [`GSBezStringPen`](/Core/GlyphsCore/GSBezStringPen) - [`GSBoundsPen`](/Core/GlyphsCore/GSBoundsPen) - [`GSPathPen`](/Core/GlyphsCore/GSPathPen) - [`GSSVGPen`](/Core/GlyphsCore/GSSVGPen) - [`GSSegmentPen`](/Core/GlyphsCore/GSSegmentPen) ### Geometry - [Geometry Helpers](/Core/GlyphsCore/GSGeometryHelpers) ### Property List - [Property List Parsing](/Core/GlyphsCore/Property-List-Parsing) - [Property List Writing](/Core/GlyphsCore/GSPropertyListWriter) ### Serialization - [Binary Reading](/Core/GlyphsCore/Binary-Reading) - [Binary Writing](/Core/GlyphsCore/Binary-Writing) ### Utilities - [String and Value Conversion](/Core/GlyphsCore/String-and-Value-Conversion) - [Curve Fitting and Offsetting](/Core/GlyphsCore/Curve-Fitting-and-Offsetting) - [Geometry and Path Operations](/Core/GlyphsCore/Geometry-and-Path-Operations) - [Validation and Format Utilities](/Core/GlyphsCore/Validation-and-Format-Utilities) - [Miscellaneous Functions](/Core/GlyphsCore/Miscellaneous-Functions) ### Constants - [Shape and Path Keys](/Core/GlyphsCore/Shape-and-Path-Keys) - [Geometry and Grid Constants](/Core/GlyphsCore/Geometry-Constants) - [Miscellaneous Constants](/Core/GlyphsCore/Miscellaneous-Constants) - [Legacy Constants](/Core/GlyphsCore/Legacy-Constants) ### Articles - [Layer Drawing](/Core/GlyphsCore/Layer-Drawing) — Drawing the contents of a layer can be done for different output formats. These include black-and-white vector outlines (TrueType glif), color vector (OpenType COLR), bitmap graphics (PNG), and mixed formats that can hold both vector and bitmap graphics (SVG, PDF). ### Classes - [`GSAlignmentZone`](/Core/GlyphsCore/GSAlignmentZone) — This class defines an alignment zone, which conforms to the GSItemProtocol. - [`GSAxisPart`](/Core/GlyphsCore/GSAxisPart) — The class implementing the properties in Smart Glyphs. - [`GSBaseObject`](/Core/GlyphsCore/GSBaseObject) — The abstract base class for objects positioned on a layer. - [`GSCFIndexToCFIndexMap`](/Core/GlyphsCore/GSCFIndexToCFIndexMap) — Uses a C++ std::map collection internally. - [`GSColorLine`](/Core/GlyphsCore/GSColorLine) — A color line is a sorted collection of color stops used to describe a gradient. - [`GSColorSpace`](/Core/GlyphsCore/GSColorSpace) - [`GSColorStop`](/Core/GlyphsCore/GSColorStop) - [`GSConicGradient`](/Core/GlyphsCore/GSConicGradient) - [`GSCoreGraphicsPen`](/Core/GlyphsCore/GSCoreGraphicsPen) - [`GSCustomParameter`](/Core/GlyphsCore/GSCustomParameter) - [`GSDrawComponentSlice`](/Core/GlyphsCore/GSDrawComponentSlice) - [`GSDrawEnvironment`](/Core/GlyphsCore/GSDrawEnvironment) - [`GSDrawErrorSlice`](/Core/GlyphsCore/GSDrawErrorSlice) - [`GSDrawGroupSlice`](/Core/GlyphsCore/GSDrawGroupSlice) - [`GSDrawImageSlice`](/Core/GlyphsCore/GSDrawImageSlice) - [`GSDrawPenSlice`](/Core/GlyphsCore/GSDrawPenSlice) - [`GSDrawSlice`](/Core/GlyphsCore/GSDrawSlice) - [`GSDrawSliceMask`](/Core/GlyphsCore/GSDrawSliceMask) - [`GSDrawTextSlice`](/Core/GlyphsCore/GSDrawTextSlice) - [`GSEPStoPath`](/Core/GlyphsCore/GSEPStoPath) - [`GSElement`](/Core/GlyphsCore/GSElement) — The abstract base class for positioned elements. - [`GSFeatureComposer`](/Core/GlyphsCore/GSFeatureComposer) - [`GSFeatureGenerator`](/Core/GlyphsCore/GSFeatureGenerator) — Generates the OT features for the Font. - [`GSFilterHandler`](/Core/GlyphsCore/GSFilterHandler) - [`GSGeometry`](/Core/GlyphsCore/GSGeometry) - [`GSGlyphInfo`](/Core/GlyphsCore/GSGlyphInfo) — GSGlyphInfo: The class defining the glyphInfo object This class defines the glyphInfo object. - [`GSGlyphSortDescriptor`](/Core/GlyphsCore/GSGlyphSortDescriptor) - [`GSGlyphsInfo`](/Core/GlyphsCore/GSGlyphsInfo) - [`GSGradient`](/Core/GlyphsCore/GSGradient) - [`GSGradientKnob`](/Core/GlyphsCore/GSGradientKnob) - [`GSHandle`](/Core/GlyphsCore/GSHandle) - [`GSHobbyKnob`](/Core/GlyphsCore/GSHobbyKnob) - [`GSHobbyKnot`](/Core/GlyphsCore/GSHobbyKnot) - [`GSHobbyNodeInfo`](/Core/GlyphsCore/GSHobbyNodeInfo) - [`GSIconPreset`](/Core/GlyphsCore/GSIconPreset) - [`GSImage`](/Core/GlyphsCore/GSImage) — GSBackgroundImage: The class defining the image - [`GSIndexedLookupTable`](/Core/GlyphsCore/GSIndexedLookupTable) - [`GSInfoProperty`](/Core/GlyphsCore/GSInfoProperty) - [`GSInfoValue`](/Core/GlyphsCore/GSInfoValue) - [`GSInfoValueLocalized`](/Core/GlyphsCore/GSInfoValueLocalized) - [`GSInfoValueSingle`](/Core/GlyphsCore/GSInfoValueSingle) - [`GSInterpolationFontProxy`](/Core/GlyphsCore/GSInterpolationFontProxy) - [`GSKeyValueObservation`](/Core/GlyphsCore/GSKeyValueObservation) — A reimplementation of Swift’s `NSKeyValueObservation`, usable from Objective-C and using string key paths. - [`GSLayerDrawHelper`](/Core/GlyphsCore/GSLayerDrawHelper) - [`GSLinearGradient`](/Core/GlyphsCore/GSLinearGradient) - [`GSMetric`](/Core/GlyphsCore/GSMetric) — metrics value entry - [`GSNameParticle`](/Core/GlyphsCore/GSNameParticle) - [`GSNotifyingDictionary`](/Core/GlyphsCore/GSNotifyingDictionary) - [`GSNullPen`](/Core/GlyphsCore/GSNullPen) — A pen that does nothing except fulfill the pen protocol. - [`GSOffsetCurve`](/Core/GlyphsCore/GSOffsetCurve) - [`GSPDFObject`](/Core/GlyphsCore/GSPDFObject) - [`GSPDFParser`](/Core/GlyphsCore/GSPDFParser) - [`GSPDFReader`](/Core/GlyphsCore/GSPDFReader) - [`GSPaletteColor`](/Core/GlyphsCore/GSPaletteColor) — A color that references a base color from a color palette and multiplies the alpha component with an additional factor. - [`GSPalettes`](/Core/GlyphsCore/GSPalettes) — This class defines the palettes object which conforms to the GSItemProtocol and NSCopying. - [`GSPathHash`](/Core/GlyphsCore/GSPathHash) - [`GSPathHashElement`](/Core/GlyphsCore/GSPathHashElement) - [`GSPathOperator`](/Core/GlyphsCore/GSPathOperator) - [`GSPathSegment`](/Core/GlyphsCore/GSPathSegment) - [`GSPenPoint`](/Core/GlyphsCore/GSPenPoint) - [`GSProxyShapes`](/Core/GlyphsCore/GSProxyShapes) - [`GSRadialGradient`](/Core/GlyphsCore/GSRadialGradient) — A radial (circular/angular) gradient. - [`GSRoundCorner`](/Core/GlyphsCore/GSRoundCorner) - [`GSSVGtoPath`](/Core/GlyphsCore/GSSVGtoPath) - [`GSSafeAffineTransform`](/Core/GlyphsCore/GSSafeAffineTransform) - [`GSSafeBezierPath`](/Core/GlyphsCore/GSSafeBezierPath) - [`GSSaveContext`](/Core/GlyphsCore/GSSaveContext) - [`GSShadow`](/Core/GlyphsCore/GSShadow) - [`GSSidebarItem`](/Core/GlyphsCore/GSSidebarItem) - [`GSTTStem`](/Core/GlyphsCore/GSTTStem) - [`GSTransformableElement`](/Core/GlyphsCore/GSTransformableElement) - [`GSUndoManager`](/Core/GlyphsCore/GSUndoManager) - [`MGOrderedDictionary`](/Core/GlyphsCore/MGOrderedDictionary) — /// /// ////// ////// ////// ////// ////// ////// // ### Protocols - [`GSContainerProtocol`](/Core/GlyphsCore/GSContainerProtocol) - [`GSContentProtocol`](/Core/GlyphsCore/GSContentProtocol) - [`GSDrawPath`](/Core/GlyphsCore/GSDrawPath) - [`GSIdentifiableParameter`](/Core/GlyphsCore/GSIdentifiableParameter) - [`GSItemProtocol`](/Core/GlyphsCore/GSItemProtocol) - [`GSOutlineImporter`](/Core/GlyphsCore/GSOutlineImporter) - [`GSParametersAndPropertiesProtocol`](/Core/GlyphsCore/GSParametersAndPropertiesProtocol) - [`GSPenProtocol`](/Core/GlyphsCore/GSPenProtocol) - [`GSSelectableElementProtocol`](/Core/GlyphsCore/GSSelectableElementProtocol) — A common interface for positioned objects that can participate in layer editing and selection. - [`GSUndoClientProtocol`](/Core/GlyphsCore/GSUndoClientProtocol) - [`GSUserDataProtocol`](/Core/GlyphsCore/GSUserDataProtocol) — An interface for storing persistent data associated with a model object. - [`GlyphsCallback`](/Core/GlyphsCore/GlyphsCallback) - [`GlyphsFilterCore`](/Core/GlyphsCore/GlyphsFilterCore) — The protocol defining the filter plugin interface ### Structures - [`GSIntersectResultsStruct`](/Core/GlyphsCore/GSIntersectResultsStruct) - [`GSNVector`](/Core/GlyphsCore/GSNVector) - [`GSPlistParseInfo`](/Core/GlyphsCore/GSPlistParseInfo) - [`GSPoint3`](/Core/GlyphsCore/GSPoint3) - [`GSSegmentStruct`](/Core/GlyphsCore/GSSegmentStruct) - [`GSTangentInfo`](/Core/GlyphsCore/GSTangentInfo) - [`OABezierPathPosition`](/Core/GlyphsCore/OABezierPathPosition) ### Functions - [`GSDebugBreak`](/Core/GlyphsCore/GSDebugBreak) ### Macros - [`CFOldStylePList_h`](/Core/GlyphsCore/CFOldStylePList_h) - [`CLAMP`](/Core/GlyphsCore/CLAMP) - [`DEG`](/Core/GlyphsCore/DEG) - [`DTOR`](/Core/GlyphsCore/DTOR) - [`E`](/Core/GlyphsCore/E) - [`FALSE`](/Core/GlyphsCore/FALSE) - [`GLYPHS4`](/Core/GlyphsCore/GLYPHS4) - [`GLYPHS_VERSION`](/Core/GlyphsCore/GLYPHS_VERSION) - [`GOLDEN`](/Core/GlyphsCore/GOLDEN) - [`GSAssertSegmentStructType`](/Core/GlyphsCore/GSAssertSegmentStructType) - [`GSAutomaticCodeMarker`](/Core/GlyphsCore/GSAutomaticCodeMarker) - [`GSCheckKey`](/Core/GlyphsCore/GSCheckKey) - [`GSDataAppendString`](/Core/GlyphsCore/GSDataAppendString) - [`GSDeprecated`](/Core/GlyphsCore/GSDeprecated) - [`GSFloatsEqual`](/Core/GlyphsCore/GSFloatsEqual) - [`GSFloatsEqualThreshold`](/Core/GlyphsCore/GSFloatsEqualThreshold) - [`GSNum`](/Core/GlyphsCore/GSNum) - [`GSOutlineFormatIsCubic`](/Core/GlyphsCore/GSOutlineFormatIsCubic) - [`GSOutlineFormatIsStatic`](/Core/GlyphsCore/GSOutlineFormatIsStatic) - [`GSOutlineFormatIsTT`](/Core/GlyphsCore/GSOutlineFormatIsTT) - [`GSOutlineFormatIsVariable`](/Core/GlyphsCore/GSOutlineFormatIsVariable) - [`GSPointIsZero`](/Core/GlyphsCore/GSPointIsZero) - [`GSPointsEqual`](/Core/GlyphsCore/GSPointsEqual) - [`GSRectsEqual`](/Core/GlyphsCore/GSRectsEqual) - [`GSRound`](/Core/GlyphsCore/GSRound) - [`GSShapeTypeAll`](/Core/GlyphsCore/GSShapeTypeAll) - [`GSWritingDirectionIsHorizontal`](/Core/GlyphsCore/GSWritingDirectionIsHorizontal) - [`GSWritingDirectionIsLTR`](/Core/GlyphsCore/GSWritingDirectionIsLTR) - [`GSWritingDirectionIsLineToLeft`](/Core/GlyphsCore/GSWritingDirectionIsLineToLeft) - [`GSWritingDirectionIsLineToRight`](/Core/GlyphsCore/GSWritingDirectionIsLineToRight) - [`GSWritingDirectionIsRTL`](/Core/GlyphsCore/GSWritingDirectionIsRTL) - [`GSWritingDirectionIsVertical`](/Core/GlyphsCore/GSWritingDirectionIsVertical) - [`GS_COLOR_COMPONENT_PRECISION`](/Core/GlyphsCore/GS_COLOR_COMPONENT_PRECISION) - [`GS_IMPORT_COLOR_COMPONENT`](/Core/GlyphsCore/GS_IMPORT_COLOR_COMPONENT) - [`GS_PATH_SEGMENT_ELEMENT_CAPACITY`](/Core/GlyphsCore/GS_PATH_SEGMENT_ELEMENT_CAPACITY) - [`GS_PRODUCE_QUADRATIC_NSBEZIERPATH_ELEMENTS`](/Core/GlyphsCore/GS_PRODUCE_QUADRATIC_NSBEZIERPATH_ELEMENTS) - [`GS_SET_ELEMENT_PROPERTY`](/Core/GlyphsCore/GS_SET_ELEMENT_PROPERTY) - [`GS_SET_ELEMENT_PROPERTY_CHILD`](/Core/GlyphsCore/GS_SET_ELEMENT_PROPERTY_CHILD) - [`GS_SET_ELEMENT_PROPERTY_FLOAT`](/Core/GlyphsCore/GS_SET_ELEMENT_PROPERTY_FLOAT) - [`GS_SET_ELEMENT_PROPERTY_INT`](/Core/GlyphsCore/GS_SET_ELEMENT_PROPERTY_INT) - [`GS_SET_ELEMENT_PROPERTY_OBJECT`](/Core/GlyphsCore/GS_SET_ELEMENT_PROPERTY_OBJECT) - [`GS_SET_ELEMENT_PROPERTY_POINT`](/Core/GlyphsCore/GS_SET_ELEMENT_PROPERTY_POINT) - [`LERP`](/Core/GlyphsCore/LERP) - [`MAX_UNICODE`](/Core/GlyphsCore/MAX_UNICODE) - [`M_PI_180`](/Core/GlyphsCore/M_PI_180) - [`NEWSTRUCT`](/Core/GlyphsCore/NEWSTRUCT) - [`NEWTYPE`](/Core/GlyphsCore/NEWTYPE) - [`NSBezierPathElementCubicCurveTo`](/Core/GlyphsCore/NSBezierPathElementCubicCurveTo) - [`NSBezierPathElementQuadraticCurveTo`](/Core/GlyphsCore/NSBezierPathElementQuadraticCurveTo) - [`OBASSERT`](/Core/GlyphsCore/OBASSERT) - [`OBASSERT_NOT_REACHED`](/Core/GlyphsCore/OBASSERT_NOT_REACHED) - [`OBINVARIANT`](/Core/GlyphsCore/OBINVARIANT) - [`OBPOSTCONDITION`](/Core/GlyphsCore/OBPOSTCONDITION) - [`OBPRECONDITION`](/Core/GlyphsCore/OBPRECONDITION) - [`OFF`](/Core/GlyphsCore/OFF) - [`ON`](/Core/GlyphsCore/ON) - [`OTFErrorAddInflections`](/Core/GlyphsCore/OTFErrorAddInflections) - [`OTFErrorGenerateFont`](/Core/GlyphsCore/OTFErrorGenerateFont) - [`OTFErrorGlyphsWithError`](/Core/GlyphsCore/OTFErrorGlyphsWithError) - [`PIOVER2`](/Core/GlyphsCore/PIOVER2) - [`PITIMES2`](/Core/GlyphsCore/PITIMES2) - [`PT_EPSILON`](/Core/GlyphsCore/PT_EPSILON) - [`RAD`](/Core/GlyphsCore/RAD) - [`RTOD`](/Core/GlyphsCore/RTOD) - [`SQRT2`](/Core/GlyphsCore/SQRT2) - [`SQRT3`](/Core/GlyphsCore/SQRT3) - [`SWAP`](/Core/GlyphsCore/SWAP) - [`TRUE`](/Core/GlyphsCore/TRUE) - [`T_EPSILON`](/Core/GlyphsCore/T_EPSILON) - [`defaultCorrectContrast`](/Core/GlyphsCore/defaultCorrectContrast) - [`defaultCorrectShape`](/Core/GlyphsCore/defaultCorrectShape) - [`defaultCorrectThickness`](/Core/GlyphsCore/defaultCorrectThickness) - [`skipWhiteSpace`](/Core/GlyphsCore/skipWhiteSpace) - [`skipWhiteSpaceFast`](/Core/GlyphsCore/skipWhiteSpaceFast) ### Type Aliases - [`FloatValue_t`](/Core/GlyphsCore/FloatValue_t) - [`GSAxis.GSAxisTag`](/Core/GlyphsCore/GSAxis/GSAxisTag) - [`GSAxisValues`](/Core/GlyphsCore/GSAxisValues) — Maps axis ids to metric values. - [`GSCFIndexToCFIndexMapEnumeratorBlock`](/Core/GlyphsCore/GSCFIndexToCFIndexMapEnumeratorBlock) - [`GSCompositingOperation`](/Core/GlyphsCore/GSCompositingOperation) — Compositing operation, documented with the OpenType, Core Graphics, and NSGraphics constants. - [`GSContainer`](/Core/GlyphsCore/GSContainer) - [`GSCustomParameterKey`](/Core/GlyphsCore/GSCustomParameterKey) - [`GSDrawingOption`](/Core/GlyphsCore/GSDrawingOption) - [`GSEditViewGlyphName`](/Core/GlyphsCore/GSEditViewGlyphName) - [`GSFilterCallbackType`](/Core/GlyphsCore/GSFilterCallbackType) - [`GSFilterName`](/Core/GlyphsCore/GSFilterName) - [`GSFontFormat`](/Core/GlyphsCore/GSFontFormat) - [`GSFontKey`](/Core/GlyphsCore/GSFontKey) - [`GSFontTypeKey`](/Core/GlyphsCore/GSFontTypeKey) - [`GSGlyphCategory`](/Core/GlyphsCore/GSGlyphCategory) — Common categories/subCategories - [`GSGlyphSubcategory`](/Core/GlyphsCore/GSGlyphSubcategory) - [`GSGlyphSubdivisionKey`](/Core/GlyphsCore/GSGlyphSubdivisionKey) - [`GSHintKey`](/Core/GlyphsCore/GSHintKey) - [`GSHobbyNodeInfoKey`](/Core/GlyphsCore/GSHobbyNodeInfoKey) - [`GSImageExportSetting`](/Core/GlyphsCore/GSImageExportSetting) - [`GSInstanceAxisKey`](/Core/GlyphsCore/GSInstanceAxisKey) - [`GSInstanceTypeKey`](/Core/GlyphsCore/GSInstanceTypeKey) - [`GSLanguageTag`](/Core/GlyphsCore/GSLanguageTag) - [`GSLayerAttribute`](/Core/GlyphsCore/GSLayerAttribute) - [`GSMetricsKey`](/Core/GlyphsCore/GSMetricsKey) - [`GSMutableAxisValues`](/Core/GlyphsCore/GSMutableAxisValues) - [`GSNodeKey`](/Core/GlyphsCore/GSNodeKey) - [`GSObjectGroupKey`](/Core/GlyphsCore/GSObjectGroupKey) - [`GSPalettesKey`](/Core/GlyphsCore/GSPalettesKey) - [`GSParameterIdentifier`](/Core/GlyphsCore/GSParameterIdentifier) - [`GSPenPointKey`](/Core/GlyphsCore/GSPenPointKey) - [`GSPropertyName`](/Core/GlyphsCore/GSPropertyName) — A key identifying a font information property. - [`GSScriptID`](/Core/GlyphsCore/GSScriptID) - [`GSScriptTag`](/Core/GlyphsCore/GSScriptTag) - [`GSShapeGroup.GSShapeGroupID`](/Core/GlyphsCore/GSShapeGroup/GSShapeGroupID) - [`GSShapeKey`](/Core/GlyphsCore/GSShapeKey) - [`GSSidebarItemImageName`](/Core/GlyphsCore/GSSidebarItemImageName) - [`ListBlock_t`](/Core/GlyphsCore/ListBlock_t) - [`NSBezierPathSegmentIndex`](/Core/GlyphsCore/NSBezierPathSegmentIndex) - [`PathIntersectionList`](/Core/GlyphsCore/PathIntersectionList) - [`boolean`](/Core/GlyphsCore/boolean) - [`flag`](/Core/GlyphsCore/flag) ### Enumerations - [`AMTriangleOrientation`](/Core/GlyphsCore/AMTriangleOrientation) - [`GSAlignment`](/Core/GlyphsCore/GSAlignment) - [`GSAnnotationType`](/Core/GlyphsCore/GSAnnotationType) — The Type of the annotation - [`GSCase`](/Core/GlyphsCore/GSCase) — The case classification of a glyph. - [`GSColorSpaceChangeMethod`](/Core/GlyphsCore/GSColorSpaceChangeMethod) - [`GSDrawEnvironment.GSDrawEnvironmentSetting`](/Core/GlyphsCore/GSDrawEnvironment/GSDrawEnvironmentSetting) - [`GSDrawSliceError`](/Core/GlyphsCore/GSDrawSliceError) - [`GSDrawStackFeature`](/Core/GlyphsCore/GSDrawStackFeature) - [`GSElementAttachment`](/Core/GlyphsCore/GSElementAttachment) — A placement or fitting option for attaching a corner or cap component to a path. - [`GSExportContext`](/Core/GlyphsCore/GSExportContext) - [`GSFeaBlockType`](/Core/GlyphsCore/GSFeaBlockType) - [`GSFigureStyles`](/Core/GlyphsCore/GSFigureStyles) — The style of the default figure glyphs in a font. - [`GSFormatVersion`](/Core/GlyphsCore/GSFormatVersion) — A version of the Glyphs source format. - [`GSGlyphCopyOptions`](/Core/GlyphsCore/GSGlyphCopyOptions) — Flags controlling which associated data is included when copying fonts, glyphs, and layers. - [`GSGlyphInfoType`](/Core/GlyphsCore/GSGlyphInfoType) - [`GSGradientExtendMode`](/Core/GlyphsCore/GSGradientExtendMode) - [`GSGradientKnobType`](/Core/GlyphsCore/GSGradientKnobType) - [`GSGradientType`](/Core/GlyphsCore/GSGradientType) - [`GSHandle.GSHandleSize`](/Core/GlyphsCore/GSHandle/GSHandleSize) — The display size of handles used to edit graphical elements. - [`GSHandleFlag`](/Core/GlyphsCore/GSHandleFlag) - [`GSHint.GSHintOptions`](/Core/GlyphsCore/GSHint/GSHintOptions) - [`GSHintStates`](/Core/GlyphsCore/GSHintStates) - [`GSHintType`](/Core/GlyphsCore/GSHintType) — Hint types - [`GSHobbyFollow`](/Core/GlyphsCore/GSHobbyFollow) - [`GSHobbyKnobType`](/Core/GlyphsCore/GSHobbyKnobType) - [`GSHobbyType`](/Core/GlyphsCore/GSHobbyType) - [`GSImageType`](/Core/GlyphsCore/GSImageType) - [`GSInstanceType`](/Core/GlyphsCore/GSInstanceType) — Enum defining the types of instances. - [`GSIntersectionState`](/Core/GlyphsCore/GSIntersectionState) - [`GSLabelColor`](/Core/GlyphsCore/GSLabelColor) - [`GSLayerCompareFlags`](/Core/GlyphsCore/GSLayerCompareFlags) - [`GSMetricsAlignmentType`](/Core/GlyphsCore/GSMetricsAlignmentType) - [`GSMetricsKeysUI`](/Core/GlyphsCore/GSMetricsKeysUI) — State flags for metrics key display. - [`GSMetricsType`](/Core/GlyphsCore/GSMetricsType) - [`GSNode.GSNodeSide`](/Core/GlyphsCore/GSNode/GSNodeSide) — A side of a node along a path. - [`GSOutlineFormat`](/Core/GlyphsCore/GSOutlineFormat) — An outline format used to export a static or variable OpenType font. - [`GSPDFObjectType`](/Core/GlyphsCore/GSPDFObjectType) - [`GSPackageType`](/Core/GlyphsCore/GSPackageType) — The storage layout of a Glyphs source file. - [`GSPalettes.GSPalettesAttribute`](/Core/GlyphsCore/GSPalettes/GSPalettesAttribute) — Enumeration defining palette attributes. - [`GSPartSetting`](/Core/GlyphsCore/GSPartSetting) - [`GSPathOperationOptions`](/Core/GlyphsCore/GSPathOperationOptions) - [`GSPathOperations`](/Core/GlyphsCore/GSPathOperations) - [`GSPenOperation`](/Core/GlyphsCore/GSPenOperation) - [`GSRemoveOverlapOptions`](/Core/GlyphsCore/GSRemoveOverlapOptions) - [`GSRotationDirection`](/Core/GlyphsCore/GSRotationDirection) - [`GSSaveOptions`](/Core/GlyphsCore/GSSaveOptions) — Options that control the data written while saving Glyphs source data. - [`GSSegmentOptions`](/Core/GlyphsCore/GSSegmentOptions) - [`GSSidebarItemType`](/Core/GlyphsCore/GSSidebarItemType) - [`INLineArrowStyle`](/Core/GlyphsCore/INLineArrowStyle) - [`OAIntersectionAspect`](/Core/GlyphsCore/OAIntersectionAspect)