Creating sample data
If you bind objects in your application to live data, you can usually see that data only when you run your application, and only if the data is available to you. This can make it difficult to design the appearance of the objects that will display the data.
To display data at design time on the artboard, you can use sample data. Optionally, you can also display sample data when you run your application.
If you create your sample data to use the same schema as the live data that your production application will use, you can simultaneously bind sample data and live data to the same objects. Your sample data will display on the artboard, and your live data will display when you run your application (F5).