You can pass this constant to the following functions to remove previously set values from a style object: to ATSUClearAttributes to remove style run attributes, to ATSUClearFontFeatures to remove font features, and to ATSUClearFontVariations to remove font variations.
You can also use this constant to remove previously set text layout attributes: to ATSUClearLineControls, to remove text layout attributes from a single line of a text layout object, and to ATSUClearLayoutControls to remove text layout attributes from every line in a text layout object.
enum {
kATSUClearAll = (long)0xFFFFFFFF
};
Constant description
kATSUClearAll
Removes all previously set values from a style object, a single line, or a text layout object.
