At the top of the Search Results Page view are a series of Tabs:

File Info: This tab provides information about how the search or list was assembled.  It provides a "bread crumb" trail to retrace the search or list history.

Summary View: This tab provides a Summary View of the search or list with two subviews: (1) an Analysis View and (2) a Paragraph View.

Work Bench: This tab provides a "list view" or "analysis view" of the search or analysis.   Use the Work Bench for a more fine grained analysis.   The "Select New Fields" and "Search within List" tabs are used in the Work Bench.

Select New Fields: With this tab you can select new fields to display in the Work Bench.

Search within List: With this tab you can refine your search or analysis by searching within the list displayed in the Work Bench.