# Text Format Description Constants Constants that identify text format descriptions. ## Topics ### Description Constants [`kCMTextFormatDescriptionColor_Red`](/documentation/CoreMedia/kCMTextFormatDescriptionColor_Red) The color value for red is a number. [`kCMTextFormatDescriptionColor_Green`](/documentation/CoreMedia/kCMTextFormatDescriptionColor_Green) The color value for green is a number. [`kCMTextFormatDescriptionColor_Blue`](/documentation/CoreMedia/kCMTextFormatDescriptionColor_Blue) The color value for blue is a number. [`kCMTextFormatDescriptionColor_Alpha`](/documentation/CoreMedia/kCMTextFormatDescriptionColor_Alpha) The color value for the alpha is a number. [`kCMTextFormatDescriptionRect_Top`](/documentation/CoreMedia/kCMTextFormatDescriptionRect_Top) The top value for the rect as a 16-bit number. [`kCMTextFormatDescriptionRect_Left`](/documentation/CoreMedia/kCMTextFormatDescriptionRect_Left) The left value for the rect as a 16-bit number. [`kCMTextFormatDescriptionRect_Bottom`](/documentation/CoreMedia/kCMTextFormatDescriptionRect_Bottom) The bottom value for the rect as a 16-bit number. [`kCMTextFormatDescriptionRect_Right`](/documentation/CoreMedia/kCMTextFormatDescriptionRect_Right) The right value for the rect as a 16-bit number. [`kCMTextFormatDescriptionStyle_StartChar`](/documentation/CoreMedia/kCMTextFormatDescriptionStyle_StartChar) The style value for the starting character. [`kCMTextFormatDescriptionStyle_Font`](/documentation/CoreMedia/kCMTextFormatDescriptionStyle_Font) The style value for font. [`kCMTextFormatDescriptionStyle_FontFace`](/documentation/CoreMedia/kCMTextFormatDescriptionStyle_FontFace) The style value for font face. [`kCMTextFormatDescriptionStyle_ForegroundColor`](/documentation/CoreMedia/kCMTextFormatDescriptionStyle_ForegroundColor) The style value for foreground color. [`kCMTextFormatDescriptionStyle_EndChar`](/documentation/CoreMedia/kCMTextFormatDescriptionStyle_EndChar) The style value for the ending character. [`kCMTextFormatDescriptionStyle_Height`](/documentation/CoreMedia/kCMTextFormatDescriptionStyle_Height) The style value for the height. [`kCMTextFormatDescriptionStyle_Ascent`](/documentation/CoreMedia/kCMTextFormatDescriptionStyle_Ascent) The style value for the ascent. [`kCMTextFormatDescriptionStyle_FontSize`](/documentation/CoreMedia/kCMTextFormatDescriptionStyle_FontSize) The style value for the font size. ### Description Extension Constants [`kCMTextFormatDescriptionExtension_DisplayFlags`](/documentation/CoreMedia/kCMTextFormatDescriptionExtension_DisplayFlags) The extension flag that represents the display flags. [`kCMTextFormatDescriptionExtension_BackgroundColor`](/documentation/CoreMedia/kCMTextFormatDescriptionExtension_BackgroundColor) The extension flag that represents the background color. [`kCMTextFormatDescriptionExtension_DefaultTextBox`](/documentation/CoreMedia/kCMTextFormatDescriptionExtension_DefaultTextBox) The extension flag that represents the default text box. [`kCMTextFormatDescriptionExtension_DefaultStyle`](/documentation/CoreMedia/kCMTextFormatDescriptionExtension_DefaultStyle) The extension flag that represents the default style. [`kCMTextFormatDescriptionExtension_HorizontalJustification`](/documentation/CoreMedia/kCMTextFormatDescriptionExtension_HorizontalJustification) The extension flag that represents the horizontal justification. [`kCMTextFormatDescriptionExtension_VerticalJustification`](/documentation/CoreMedia/kCMTextFormatDescriptionExtension_VerticalJustification) The extension flag that represents the vertical justification. [`kCMTextFormatDescriptionExtension_FontTable`](/documentation/CoreMedia/kCMTextFormatDescriptionExtension_FontTable) The extension flag that represents the font table. [`kCMTextFormatDescriptionExtension_TextJustification`](/documentation/CoreMedia/kCMTextFormatDescriptionExtension_TextJustification) The extension flag that represents the text justification. [`kCMTextFormatDescriptionExtension_DefaultFontName`](/documentation/CoreMedia/kCMTextFormatDescriptionExtension_DefaultFontName) The extension flag that represents the default font name. --- 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)