Which design pattern focuses on displaying detailed information after selecting an item from a list?

The design pattern that focuses on displaying detailed information after selecting an item from a list is the drilldown pattern. This approach is particularly effective in user interfaces where users first see a summary or a list of items and then can select an individual item to retrieve more detailed data about it.

In this context, when a user selects an item, they are often taken to a new view or page that is specifically dedicated to providing comprehensive information or context about the chosen item. This pattern improves user experience by allowing users to navigate through layers of information: starting from a broad overview and drilling down into the specifics.

While other options, like a grid with detail view or a list with pop-out, may also present detailed information, they do so in a manner that is either always visible alongside the list or as an overlay, rather than allowing the user to transition from a general view to a more focused, detailed one. The drilldown pattern emphasizes the importance of user choice and interaction as they navigate deeper into the data structure.