SharePoint 2010 : Search in SPF

Figure 1. Most sites have a search box in the top navigation bar.

Using the search box in a document library by default searches only on that document library. However, in the search results page after you have searched, you see a Scopes drop-down with an option to revert to searching the entire site instead, as shown in Figure 2. This allows you to search only within the document library and not other document libraries.

Figure 2. The search function when you’re in a document library searches only in that document library by default, with an option to switch to searching the entire site.