Update commentary.

Author: jcs090218

indent-control.el

@@ -27,7 +27,18 @@
 
 ;;; Commentary:
 ;;
-;; Management for indentation level.
+;; Interface that combine all the indentation variables from each major
+;; mode to one giant list.
+;;
+;; You can set up the initial indentation level by changing the variable
+;; `indent-control-records'.  This variable is a list on cons cell form
+;; by (mode . level).  For example,
+;;
+;;   `(actionscript-mode . 4)`
+;;
+;; If you want to make the indentation level works consistently across all buffer.
+;; You would need to call function `indent-control-continue-with-tab-width-record'
+;; at the time you want the new buffer is loaded.
 ;;
 
 ;;; Code: