ftype: add page

pages/windows/ftype.md

@@ -0,0 +1,15 @@
+# ftype
+
+> Display or modify file types used for file extension association.
+
+- Display a list of all file types:
+
+`ftype`
+
+- Display the associated program for a specific file type:
+
+`ftype {{file_type}}`
+
+- Set the associated program for a specific file type:
+
+`ftype {{file_type}}="{{path/to/executable_command}}"`