diff --git a/docs/en/Configuration.md b/docs/en/Configuration.md
index a89d1f9..b9ac63f 100644
--- a/docs/en/Configuration.md
+++ b/docs/en/Configuration.md
@@ -2,7 +2,8 @@
 
 ## Overview
 
-The module provides a number of built in configuration settings below are the default settings
+The module provides a number of built in configuration settings below are the 
+default settings
 
 	// mysite/_config.php 
 	
@@ -23,8 +24,8 @@ The module provides a number of built in configuration settings below are the de
 		'gravatar_size' => 80
 	);
 	
-If you want to customize any of the configuration options after you have added the extension (or
-on the built-in SiteTree commenting) use `set_config_value`
+If you want to customize any of the configuration options after you have added 
+the extension (or on the built-in SiteTree commenting) use `set_config_value`
 
 	// mysite/_config.php - Sets require_login to true for all pages
 	Commenting::set_config_value('SiteTree', 'require_login', true);
@@ -34,22 +35,22 @@ on the built-in SiteTree commenting) use `set_config_value`
 	
 ## HTML Comments
 
-Comments can be configured to contain a restricted set of HTML tags
-through the `html_allowed` and `html_allowed_elements` settings.
-Raw HTML is hardly user friendly, but combined with a rich-text editor
-of your own choosing it can allow rich comment formatting.
+Comments can be configured to contain a restricted set of HTML tags through the 
+`html_allowed` and `html_allowed_elements` settings. Raw HTML is hardly user 
+friendly, but combined with a rich-text editor of your own choosing it can 
+allow rich comment formatting.
 
 In order to use this feature, you need to install the
-[HTMLPurifier](http://htmlpurifier.org/) library.
-The easiest way to do this is through [Composer](http://getcomposer.org).
+[HTMLPurifier](http://htmlpurifier.org/) library. The easiest way to do this is 
+through [Composer](http://getcomposer.org).
 
 	{
 		"require": {"ezyang/htmlpurifier": "4.*"}
 	}
 
-**Important**: Rendering user-provided HTML on your website always risks
-exposing your users to cross-site scripting (XSS) attacks, if the HTML
-isn't properly sanitized. Don't allow tags like `<script>` or arbitrary attributes.
+**Important**: Rendering user-provided HTML on your website always risks 
+exposing your users to cross-site scripting (XSS) attacks, if the HTML isn't 
+properly sanitized. Don't allow tags like `<script>` or arbitrary attributes.
 
 ## Gravatars
 
@@ -57,6 +58,41 @@ Gravatars can be turned on by adding this to your mysite/_config.php file
 
 	Commenting::set_config_value('SiteTree', 'use_gravatar', true);
 
-The default size is 80 pixels, as per the gravatar site if the 's' parameter is omitted.  To change this add the following (again to mysite/_config.php):
+The default size is 80 pixels, as per the gravatar site if the 's' parameter is 
+omitted. To change this add the following (again to mysite/_config.php):
 
-	Commenting::set_config_value('SiteTree', 'gravatar_size', 40);
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+	Commenting::set_config_value('SiteTree', 'gravatar_size', 40);
+
+If the email address used to comment does not have a gravatar, it is possible 
+to configure the default image shown.  Valid values can be found at 
+http://gravatar.com/site/implement/images/, and at the time of writing are the 
+following:
+
+* 404: do not load any image if none is associated with the email hash, instead 
+return an HTTP 404 (File Not Found) response.
+* mm: (mystery-man) a simple, cartoon-style silhouetted outline of a person 
+(does not vary by email hash).
+* identicon: a geometric pattern based on an email hash
+* monsterid: a generated 'monster' with different colors, faces, etc
+* wavatar: generated faces with differing features and backgrounds
+* retro: awesome generated, 8-bit arcade-style pixelated faces
+* blank: a transparent PNG image (border added to HTML below for demonstration 
+purposes)
+
+To change the default image style, add the following to mysite/_config.php
+
+    Commenting::set_config_value('SiteTree', 'gravatar_default', 'retro');
+
+The rating of the image can be changed by adding a line similar to this to 
+mysite/_config.php
+
+    Commenting::set_config_value('SiteTree', 'gravatar_rating', 'r');
+
+Vald values for rating are as follows:
+
+* g: suitable for display on all websites with any audience type.
+* pg: may contain rude gestures, provocatively dressed individuals, the lesser 
+swear words, or mild violence.
+* r: may contain such things as harsh profanity, intense violence, nudity, or 
+hard drug use.
+* x: may contain hardcore sexual imagery or extremely disturbing violence.
\ No newline at end of file