By Click on ‘App’ 
in the Sidebar Menu to open the App Browser. The App Browser lists the main parts of your app. You’ll see Client Code, Server Code and Assets. Client code is code that runs on the user’s browser and is responsible for the app’s User Interface.
For more information on the difference between client and server code, read this explanation
Forms are the pages that make up your Anvil app. When you create a new Anvil app, it will already have a Form added called Form1.
Click on ‘Form1’ to open the Design View of that Form. This is where we will drag and drop components to build the UI.
Rename ‘Form1’ to ‘Homepage’ by clicking the three dots menu 
and choosing ‘Rename…’.
