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(zsh.info)Zsh Line Editor

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Zsh Line Editor
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Description
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If the ZLE option is set (which it is by default in interactive shells)
and the shell input is attached to the terminal, the user is able to
edit command lines.

There are two display modes.  The first, multiline mode, is the
default.  It only works if the TERM parameter is set to a valid
terminal type that can move the cursor up.  The second, single line
mode, is used if TERM is invalid or incapable of moving the cursor up,
or if the SINGLE_LINE_ZLE option is set.  This mode is similar to
`ksh', and uses no termcap sequences.  If TERM is "emacs", the ZLE
option will be unset by default.

The parameters BAUD, COLUMNS, and LINES are also used by the line
editor.  Note: Parameters Used By The Shell.

Keymaps

Zle Builtins

Zle Widgets