Document search allows you to select the title of a document or a summary, then enter the title or summary for your search choice. The duplicate fields allow you to perform two completely different searches. For example, you could select title for one search and summary for the second.
Click the plus (+) sign to replicate the Document
Search section so that you have multiple entry fields (up to a maximum
of 32) for a search. Click the minus (-) sign to delete the most
recently added entry field.