The search bar is located on the top left of the page. Enter terms to tell Locator what you want to find. The more terms you provide, the more likely the document you are looking for is ranked at the top.
To encourage providing many terms, Locator does not exclude documents from the results if you provide terms that are not part of the document. Locator only requires at least 75% of the provided terms in the document to return it as a result.
The search bar also supports boolean parameters, see Locator - Advanced Search for details.
The search bar will show you the ten most recent queries when you click on it, and provide suggestions when you start typing.