We have completely updated the Web App Designer section in our Crash Course 101! 
Now, you can delve deeper into the interface of the updated editor and learn the basics of creating web applications in more detail. We described the concept of Layouts in detail and explained the principles of constructing navigation and the key features of working with the editor. In addition, we looked at our example of creating a small web application based on the new version of the editor.
You can check out the latest updates by following the link: