ps-print-control-characters

ps-print-control-characters is a variable defined in `ps-print.el'.
Its value is

control-8-bit

Documentation:
Specify the printable form for control and 8-bit characters.
That is, instead of sending, for example, a ^D (\004) to printer,
it is sent the string "^D".

Valid values are:

`8-bit' This is the value to use when you want an ASCII encoding of
any control or non-ASCII character. Control characters are
encoded as "^D", and non-ASCII characters have an
octal encoding.

`control-8-bit' This is the value to use when you want an ASCII encoding of
any control character, whether it is 7 or 8-bit.
European 8-bits accented characters are printed according
the current font.

`control' Only ASCII control characters have an ASCII encoding.
European 8-bits accented characters are printed according
the current font.

nil No ASCII encoding. Any character is printed according the
current font.

Any other value is treated as nil.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 20 of Emacs.