Point to defined ranges with unicodeRange attribute of @font-face declaration
<?xml version="1.0"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"> <mx:Style> @font-face { src:url("a.ttf"); fontFamily: myFontFamily; flashType: true; unicodeRange: "englishRange"; } TextArea { fontFamily: myFontFamily; fontSize: 32; } </mx:Style> <mx:Panel title="Embedded Font Character Range"> <mx:TextArea width="400" height="150" text="The Text Uses Only Some of Available Characters 0 1 2 3 4 5 6 7 8 9."/> </mx:Panel> </mx:Application>