> @@ -2674,6 +2674,29 @@ Placeholder   Description
               useful if you're debugging color schemes or related code.
 ============  ===========================================================
 
+
+Filetype Regex
+``````````````
+
+The ``extract_filetype_regex`` setting contains the regex that is used
+to extract the filetype name from the file with the first capture group.
+The default value finds filetypes contained in Emacs-style tags.
+See `def_ft_regex`_.