You can use Unicode characters, control codes, and special characters in a text string to represent symbols. (All nontext characters must be entered as their ASCII equivalent.)
You can create special characters by entering the following Unicode character strings:
In addition to using Unicode characters for special characters, you can specify a special character by including control information in the text string. Use a pair of percent signs (%%) to introduce each control sequence. For example, the following control code works with standard AutoCAD text and PostScript fonts to draw character number nnn:
%%nnn
These control codes work with standard AutoCAD text fonts only: