diff --git a/resources/docs/Documentation.md b/resources/docs/Documentation.md
index bdd67f807..efdf3076f 100644
--- a/resources/docs/Documentation.md
+++ b/resources/docs/Documentation.md
@@ -20,6 +20,7 @@
     * [Feedly](#feedly)
     * [Labels](Labels.md)
     * [Downloading files](#downloading-files)
+    * [External tools](#external-tools)
     * [AdBlock](#adblock)
     * [GUI tweaking](#gui-tweaking)
 * [Miscellaneous (for advanced users)](#miscellaneous-for-advanced-users)
@@ -132,6 +133,7 @@ RSS Guard is simple (yet powerful) feed reader. It is able to fetch the most kno
     * "portable" mode support with clever auto-detection,
     * feed categorization,
     * feed authentication (BASIC),
+    * [external tools](#external-tools) - you can run your program with article URL,
     * handles tons of messages & feeds,
     * ability to backup/restore database or settings,
     * fully-featured recycle bin,
@@ -267,6 +269,12 @@ You can right click on any item in embedded web browser and hit `Save as` button
 
 You can download up to 6 files simultaneously.
 
+## External tools
+RSS Guard allows you to define a set of custom tools which you can subsequently launch with article URL being passed as parameter to your tool's binary. The feature also supports passing direct links to various media source such as pictures or videos, when used with internal web browser's context menu.
+
+<img src="images/ext-tools-message.png" width="80%">
+<img src="images/ext-tools-web.png" width="80%">
+
 ## AdBlock
 [Web-based variant](#web-based-and-lite-app-variants) of RSS Guard offers ad-blocking functionality. AdBlock uses standard AdBlock-Plus-like scripts, thus allowing you to use EasyList etc. AdBlock supports all fundamental features of AdBlock-Plus format, including element hiding rules and site-wide blocking.
 
diff --git a/resources/docs/images/ext-tools-message.png b/resources/docs/images/ext-tools-message.png
new file mode 100755
index 000000000..27c62de09
Binary files /dev/null and b/resources/docs/images/ext-tools-message.png differ
diff --git a/resources/docs/images/ext-tools-web.png b/resources/docs/images/ext-tools-web.png
new file mode 100755
index 000000000..bf39d0840
Binary files /dev/null and b/resources/docs/images/ext-tools-web.png differ