You can toggle your search results between "by projects" or "by agency" views by clicking the "View projects" and "View agencies" buttons located to the right of the "View Map" button above the search results.
Switching from the "Agency Center Search Results" page:
Click the "All Projects" link in the "View from these agencies" link set at the top of the page and you will navigate to the Project Search Results view containing the projects issued by the agencies from your search.
Switching from the "Project Center Search Results" page:
Click the button titled "View the agencies that issued this projects" and you will navigate to the Agency Search Results view, which contains only those agencies that issued the projects in your search results. (Please note that in order to use this functionality you may be asked to refine your search so that the total number of agencies is 500 or less.)
NOTE: If your project search result contains projects from fewer than 500 agencies, the number of agencies will be displayed on the button. If the search result contains projects from more than 500 agencies, the button text will read "View top 500 agencies that issued these projects," and when you click the button, you will see only the top 500 agencies. Also, if after viewing the agencies you switch back to project search results (via the "view projects issued by these 500 agencies" button), you will see fewer projects (only those issued by the top 500 agencies). To return to the original project search results from the agency list view, use the "back" button.