(@code{image-mode-mark-file}) command will mark the current file in
any Dired buffer(s) that display the current file's directory. If no
such buffer is open, the directory is opened in a new buffer. To
-unmark files, use the @kbd{u} (@code{image-mode-mark-file}) command.
+unmark files, use the @kbd{u} (@code{image-mode-unmark-file}) command.
Finally, if you just want to copy the current buffers file name to the
kill ring, you can use the @kbd{w}
(@code{image-mode-copy-file-name-as-kill}) command.