Which designer is used to define the navigation in model-driven apps?

The correct choice for defining navigation in model-driven apps is the site map designer. This designer is specifically utilized to create and manage the overall navigation structure of the app, including how users access different entities, views, charts, and dashboards. The site map defines the layout and organization of the app's features, allowing for a user-friendly experience by structuring how users move throughout the application.

When developing model-driven apps, it's crucial to have a clear navigation strategy, and the site map designer facilitates this by enabling you to customize the main areas and subareas that users will see. This directly affects how easily users can navigate to the necessary functions or data within the app, making it a key tool for enhancing usability and efficiency in model-driven solutions.

Other designers, such as the app designer, view designer, and dashboard designer, serve different purposes. The app designer is used for the overall configuration of the app itself, the view designer is focused on creating and customizing data views, and the dashboard designer allows for the assembly of visual components to present data analytics. While all these components are integral to building a comprehensive app, it is the site map designer that specifically addresses navigation creation.