Saves your current special characters on the stack and sets the defaults. This is useful at the beginning of a script to make sure standard parse characters are used while reading the script. Use the #NODEF command at the end of the script to restore the characters.
A string can be given as an argument to specify the new values of the special characters. This is a 9 character string which must be enclosed in quotes. Each character in the string represents one of the special characters. To leave the character as the default, you can use the x character as a placeholder. The characters are: