Text fields marked with a 
icon can contain backslash-style escape codes for encoding newlines, carriage returns, unprintable characters, or any arbitrary byte.
Usage
Every escape code begins with a backslash, and then either a single character representing a built-in escapable character, or an "x" and two case-insensitive hexadecimal digits. See the examples below for more information.
Special Escape Codes
The following list contains all the built-in escapable characters; any other non-printable character must be encoded as a byte:
\\– single backslash\a– bell/alert\b– backspace\d– delete\e– escape\f– form feed\n– newline\r– carriage return\s– space\t– tab\v– vertical tab\0– null byte
Examples
\r\n– the CR+LF grapheme\xAF\xFF– two arbitrary bytes with valuesAFandFFin hexadecimalQUIT\r\n– FTP QUIT commandQUIT\x0d\x0a– FTP QUIT command as above, but using byte syntax instead