Validate, to ensure that you see the following screen:
The center area is your app interface. The left side gives you a list of pages. Each page is a single route. You also have access to a number of UI components that you would normally have to code by hand in an HTML file. The panel on the right shows the properties of any selected component.
You're free to do whatever you need to do here by dropping components to the center screen. If you need to create a new page, you have to click ...
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