When you use external files that are Unicode encoded, your users must have access to fonts containing all the glyphs used in your text files. By default, Macromedia Flash MX stores the names of fonts used in dynamic or input text files. During movie playback, the Macromedia Flash Player 6 (and earlier versions) looks for those fonts on the operating system running the player.

If the text in a movie contains glyphs that are not supported by the specified font, the Macromedia Flash Player 6 will attempt to locate a font on the user's system which does support those glyphs. It is not always possible for the player to locate an appropriate font. The behavior of this function depends on the fonts available on the user's system, and the operating system running the player.

You can also embed fonts for dynamic or input text fields. However, some fonts, particularly those used for Asian languages, can add significantly to the SWF file size when embedded. See About embedded fonts and device fonts in online Help (Help > Using Flash > Working with Text).