Some languages, such as Japanese, use text fonts with thousands of non-ASCII characters. In order for drawings to contain such text, AutoCAD supports a special form of shape definition file called a Big Font file.
Special codes in the first line of a Big Font file specify how to read two-byte hexidecimal codes.
To reduce the size of composite Kanji characters, you can define an extended Big Font file. Extended big fonts use the subshape code, followed immediately by a 0.
To use a Big Font for drawing text, you set up a text style and then specify the name of the Big Font file.
To include special symbols in text strings, you can use a Big Font instead of extending a standard text font.