3.7.1. Adding Frontend UI in Studio
In order to add the frontend client module to your project:
-  Open CUBA project tree in CUBA Studio; 
-  Right-click on the Modules node; 
-  Select Manage modules > Create 'front' module item. 
Studio will install frontend generator in modules/front/generation folder (it may take a while). Then you will be prompted to choose what preset you want to use for your frontend: Polymer or React.
After creating the module, start the application server and open http://localhost:8080/app-front in a web browser. You will be presented with a login form. After logging in, the main window with a vertical menu and responsive layout will be shown.