The documentation of the exporter added

Issue-Ref: 3751
Signed-off-by: Alexandros Tsalidis <tsalidis@fortiss.org>

org.fortiss.af3.rcp.application/html/safety_cases.html

@@ -233,7 +233,44 @@ font-style: italic;
 	<p> <img src="./pictures/Maintenance5.PNG" /></p>
 </ol>
 
+<h2>
+	Feature 9: Exporter</h2>
+<h3>Why do we need exporting of a safety case diagram? </h3>
+<p>
+	After creating a safety case diagram, it is important to be able to be used independently from the tool it was created in. A safety engineer may have to use the safety case diagram
+	in many different documents he has to create, for example in safety case documentation. Usually there are a lot of text documents following the documentation, therefore exporting the safety case
+	in a common file format provides flexibility and transportability. The safety engineer is not obliged to use alternative ways to extract the safety case diagram since the feature of exporting it is now
+	integrated.
 
+</p>
+<h3>Steps to export in ExplicitCase</h3>
+<p>
+	ExplicitCase offers the option to export a safety case in three different formats: SVG, PNG, PDF. The user follows the next steps.
+</p>
+<ol>
+<li>
+	Go to any safety case module and open the editor;
+</li>
+<li>
+	Right-click anywhere in the editor. Click 'Export Module Diagram ...';
+</li>
+	<p> <img src="./pictures/Exporter1.PNG" /></p>
+	<li>
+		In the next dialogue, choose the preferred format;
+	</li>
+	<p> <img src="./pictures/Exporter2.PNG" /></p>
+	<li>
+		In second dialogue, confirm the preferred format and choose the destination of the exported file;
+	</li>
+	<p> <img src="./pictures/Exporter3.PNG" /></p>
+</ol>
+</p>
+<h3>Explanation of the colors</h3>
+<p>
+<p>
+The following legend explains the different colors used in the exported document.
+</p>
+<p> <img src="./pictures/Exporter4.PNG" /></p>
 
 <h2>Deprecated: Safety Case Patterns</h2>