I.R.I.S. IRISPen Express 6 for Windows - Manual (Page 51)

C HAPTER 6 - L EARN HOW TO ...
47
D EFINE THE SYMBOL FOR UNKNOWN
CHARACTERS
If characters are not properly recognized by the IRISPen, they are
by default represented by a tilde, i.e. a "~" symbol, in the
recognition result. If you wish to, you can choose another symbol.
To define a custom symbol for unknown characters:
• In the Application window, select the option Unknown Symbol
from the Settings menu.
• Replace the symbol in the required field, then click OK to
confirm.