Click on Location, Media Type, or Page Type. Upper case retrieves only matching upper case. Lower case retrieves either lower or upper case. Also accent and character sensitive. Other upper case ignored.
Initial capitals cause phrase search.
Separate words by commas to form different phrase groupings. Upper case ignored. Can add or exclude terms drawn from previous search results. At top of search results, can add terms based on previous search results. Rough in comparison to AltaVista's Refine.