dired-unmark-all-files

dired-unmark-all-files is an interactive compiled Lisp function in `dired.el'.


(dired-unmark-all-files MARK &optional ARG)

Remove a specific mark (or any mark) from every file.
After this command, type the mark character to remove,
or type RET to remove all marks.
With prefix arg, query for each marked file.
Type C-h at that time for help.