Home Key
The Home Key 
takes you back to your main Home screen (of the 5 total available screens).
Back Key
The Back Key 
returns you to the previously active screen. If the onscreen keyboard is currently open, this key closes the keyboard.
Using the Search Key
The Search Key 
displays the Quick Search Box that can be used to search for a key term both on the device and on the Web. Some applications, such as Contacts, GmailTM, and Google MapsTM, have the ability to search contents within those specific applications. Along with being able to search by typing in search terms, you are also able to search by voice.
Press 
to launch the Quick Search Box.
Press and hold 
to launch the Voice Search function.
Device and Web Search Using Text Entry
1.Press 
> 
.
When you press 
on the Home screen or in the other applications that support this, the Quick Search Box will open automatically.
Voice Search
Touch to search by voice.
Recent search results
Provides one touch shortcut to previously searched terms.
In some applications, such as Gmail, Contacts, Browser, and Android MarketTM, the application's own search box opens when you press 
. This is indicated by the application's icon on the left side of the search box.
