Character you have to type to start wildcard expansion in the command-line, as specified with 'wildmode'. More info here: |cmdline-completion|. The character is not recognized when used inside a macro. See 'wildcharm' for that. Although 'wc' is a number option, you can set it to a special key: > :set wc= < NOTE: This option is set to the Vi default value when 'compatible' is set and to the Vim default value when 'compatible' is reset.