Flash 8.
text.antiAliasSharpness
Property; a float value that specifies the anti-aliasing sharpness of the text. This property controls how crisply the text is drawn; higher values specify sharper (or crisper) text. A value of 0 specifies normal sharpness. This property is available only if text.fontRenderingMode is set to customThicknessSharpness.
text.antiAliasThickness, text.fontRenderingMode