changed documentation

Author: GuentherJulian

documentation/Structure.md

@@ -11,9 +11,14 @@
     |-- tutorials
         |-- [playbook-name]
             /--index.asciidoc
+            |-- images
+                /--image.png
+            
+
 
 Write your own tutorials in "./tutorials/[playbook-name]/index.asciidoc".
 You will find all the details in the tutorials [Developement](https://github.com/devonfw-tutorials/tutorials/wiki/Development) page.
+The images must be saved in a folder called `images`.
 
 
 # File system of the "tutorial-compiler" - repository 

documentation/Tutorials.md

@@ -94,6 +94,12 @@ functionName2(parameters)
 --
 ```
 
+To display images within a step, you can use either the [displayContent](https://github.com/devonfw-tutorials/tutorial-compiler/wiki/Functions#displayContent) function or the following syntax in the index.asciidoc file:
+```
+![alternative text](./assets/image.jpg)
+```
+The image must be in a folder called `images` in the folder of the playbook (see [Structure](https://github.com/devonfw-tutorials/tutorial-compiler/wiki/Structure)).
+
 You can also add an optional conclusion text, which is shown on completion of the tutorial. Use this to summarize the important content of the tutorial, to point out what to learn next or to mention other useful informations.
 
 To do that, you have to provide the conclusion at the end of the tutorial (after the last step) surrounded by ```====```.