How can I send non-printable characters, such as carriage return and escape?

If you are trying to map a function key, any non printing character can be sent by a \ and the octal ASCII code. For example, a CTRL+A can be sent via a \001 or a CTRL+H can be send via a \010. The ASCII control characters are listed in the ASCII Character Codes topic in the online help.

Two common non-printing characters, carriage return and the escape code have the easy to remember sequences \r and \e in addition to \015 and \033.