dired-isearch-filenamesdired-isearch-filenames is a variable defined in `
dired-aux.el'. Its value is
nilDocumentation: Non-nil to Isearch in file names only. If t, Isearch in Dired always matches only file names. If `dwim', Isearch matches file names when initial point position is on a file name. Otherwise, it searches the whole buffer without restrictions. You can customize this variable. This variable was introduced, or its default value was changed, in version 23.1 of Emacs.