diff --git a/2.-Software-Architecture-Specification.md b/2.-Software-Architecture-Specification.md
index 9b60094..27a01bc 100644
--- a/2.-Software-Architecture-Specification.md
+++ b/2.-Software-Architecture-Specification.md
@@ -37,7 +37,7 @@
 
 
 ***
-# Introduction <a name="I"/>
+# 1. Introduction <a name="I"/>
 
 The aim of this project is to program a standalone application for Windows based on a plugin for the AutomationML editor. The graphical user interface should be improved and support the modelling of sensors according to IEC 60947-5 should be offered. Furthermore, it should be possible to create devices, add device interfaces and file attachments.
 
@@ -55,18 +55,15 @@ The aim of this project is to program a standalone application for Windows based
 
 **.NET** The .NET Framework is a software development and runtime environment developed by Microsoft for Microsoft Windows.
 
-1.
-# System Overview
+# 2. System Overview <a name="S"/>
 
-  1.
-## System Environment
+## 2.1 System Environment <a name="S1"/>
 
 The standalone application can only be accessed via Windows, as this operating system is used as the platform. The application can be installed and the graphical user interface can be used via this platform. In contrast to the plug-in, the editor no longer needs to be used.
 
 Among others the IODD and GSD converter are used as neighbouring systems.
 
-  1.
-## Software Environment
+## 2.2 Software Environment <a name="S2"/>
 
 For the standalone application to work, you need at least version 4.5 of the .Net framework, as C# was used developing it. This version of the framework is available from the &quot;Windows Vista&quot; operating system variant onwards. You do not need any further software, as this is a standalone application.