screen: Character Processing
11.11 Character Processing
==========================
-- Command: c1 [state]
(none)
Change c1 code processing. 'c1 on' tells screen to treat the input
characters between 128 and 159 as control functions. Such an 8-bit
code is normally the same as ESC followed by the corresponding
7-bit code. The default setting is to process c1 codes and can be
changed with the 'defc1' command. Users with fonts that have
usable characters in the c1 positions may want to turn this off.
-- Command: gr [state]
(none)
Turn GR charset switching on/off. Whenever screen sees an input
char with an 8th bit set, it will use the charset stored in the GR
slot and print the character with the 8th bit stripped. The
default (see also 'defgr') is not to process GR switching because
otherwise the ISO88591 charset would not work.
-- Command: bce [state]
(none)
Change background-color-erase setting. If 'bce' is set to on, all
characters cleared by an erase/insert/scroll/clear operation will
be displayed in the current background color. Otherwise the
default background color is used.
-- Command: encoding enc [denc]
(none)
Tell screen how to interpret the input/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. ⇒Special
Capabilities.
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.
-- Command: charset set
(none)
Change the current character set slot designation and charset
mapping. The first four character of SET are treated as charset
designators while the fifth and sixth character must be in range
'0' to '3' and set the GL/GR charset mapping. On every position a
'.' may be used to indicate that the corresponding charset/mapping
should not be changed (SET is padded to six characters internally
by appending '.' chars). New windows have 'BBBB02' as default
charset, unless a 'encoding' command is active.
The current setting can be viewed with the ⇒Info command.
-- Command: utf8 [state [dstate]]
(none)
Change the encoding used in the current window. If utf8 is
enabled, the strings sent to the window will be UTF-8 encoded and
vice versa. Omitting the parameter toggles the setting. If a
second parameter is given, the display's encoding is also changed
(this should rather be done with screen's '-U' option). See also
'defutf8', which changes the default setting of a new window.
-- Command: defc1 state
(none)
Same as the 'c1' command except that the default setting for new
windows is changed. Initial setting is 'on'.
-- Command: defgr state
(none)
Same as the 'gr' command except that the default setting for new
windows is changed. Initial setting is 'off'.
-- Command: defbce state
(none)
Same as the 'bce' command except that the default setting for new
windows is changed. Initial setting is 'off'.
-- Command: defencoding enc
(none)
Same as the 'encoding' command except that the default setting for
new windows is changed. Initial setting is the encoding taken from
the terminal.
-- Command: defcharset [set]
(none)
Like the 'charset' command except that the default setting for new
windows is changed. Shows current default if called without
argument.
-- Command: defutf8 state
(none)
Same as the 'utf8' command except that the default setting for new
windows is changed. Initial setting is 'on' if screen was started
with '-U', otherwise 'off'.
-- Command: cjkwidth [state]
(none)
Toggle how ambiguoous characters are treated. If cjkwidth is on
screen interprets them as double (full) width characters. If off
then they are seen as one cell (half) width characters.