Update README.md

Author: mriscoc

README.md

@@ -20,6 +20,8 @@ To build Marlin 2.0 you'll need [Building Marlin with PlatformIO for ReArm](http
 
 Released versions of this firmware can be found on the [Releases page](https://github.com/mriscoc/Marlin_Ender3v2/releases).
 
+![](https://raw.githubusercontent.com/mriscoc/Marlin_Ender3v2/Ender3v2-Released/screenshots/thumbnail2.jpg)
+
 ## Wiki
  - [How to install the firmware](https://github.com/mriscoc/Marlin_Ender3v2/wiki/How-to-install-the-firmware)
  - [Installing a 3D/BLTouch](https://github.com/mriscoc/Marlin_Ender3v2/wiki/3D-BLTouch)