NSFontPanelUnderlineEffectModeMask Display the underline popup menu. Declarationvar NSFontPanelUnderlineEffectModeMask: UInt32 { get } See AlsoConstantsNSFontPanelFaceModeMaskNSFontPanelSizeModeMaskNSFontPanelCollectionModeMaskNSFontPanelStrikethroughEffectModeMaskNSFontPanelTextColorEffectModeMaskNSFontPanelDocumentColorEffectModeMaskNSFontPanelShadowEffectModeMaskNSFontPanelAllEffectsModeMaskNSFontPanelStandardModesMaskNSFontPanelAllModesMask