The key used in Command-line Mode to open the command-line window. The default is CTRL-F when 'compatible' is off. Only non-printable keys are allowed. The key can be specified as a single character, but it is difficult to type. The preferred way is to use the <> notation. Examples:

:exe "set cedit=\<C-Y>"
:exe "set cedit=\<Esc>"

Nvi also has this option, but it only uses the first character. See cmdwin. NOTE: This option is set to the Vim default value when 'compatible' is reset.

(Vi default: "", Vim default: CTRL-F)