None.
encoding enc [enc]
Tell screen how to interpret its input and output. The first argument
sets the encoding of the current window. Each window can emulate a
different encoding. The optional second parameter overwrites the encoding
of the connected terminal. It should never be needed as screen uses the
locale setting to detect the encoding. There is also a way to select a
terminal encoding depending on the terminal type by using the “KJ”
termcap entry.
Supported encodings are: eucJP, SJIS, eucKR, eucCN, Big5, GBK, KOI8-R, CP1251, UTF-8, ISO8859-2, ISO8859-3, ISO8859-4, ISO8859-5, ISO8859-6, ISO8859-7, ISO8859-8, ISO8859-9, ISO8859-10, ISO8859-15, jis.
See also defencoding, which changes the default setting of a new window.
None yet.