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@@ -17,7 +17,7 @@ The following points will be covered by this tutorial:
 * Prepared JAVA project files for Hands-on
 
 ## 2. Installation of Copper Plugin for Mozilla Firefox
-![Copper logo](https://gitlab.amd.e-technik.uni-rostock.de/ws4d/jcoap/raw/master/ws4d-jcoap-handsOn/img/CopperLogo.jpg)
+![Copper logo](https://gitlab.amd.e-technik.uni-rostock.de/ws4d/jcoap/raw/master/ws4d-jcoap-handsOn/img/CopperLogo.jpg =250x)
 
 - https://addons.mozilla.org/de/firefox/addon/copper-270430/
 - Click on „add to Firefox“ & Confirm Installation