How to Switch between Documents in Word 2007
Word 2007 keeps each document you create or open in its own, separate window. To switch between them, you can use several methods, including the Switch Windows menu and the Activate dialog box.
Using the Switch Windows menu in Word 2007
The safest way to switch between document windows is to use the Switch Windows menu on the View tab. The menu lists up to nine open documents in Word. To switch to another document, choose it from the menu.
Using the Activate dialog box in Word 2007
Other switching techniques in Word 2007
A quick way to switch from one document window to another is to press the Alt+Tab key combination.
Each window also has its own button on the Windows taskbar. To switch between windows in Word, choose the document name from a button on the taskbar.
Pointing the mouse at a taskbar button in Windows Vista displays a tiny preview window detailing the document's contents.
The names on the taskbar buttons are the names you gave your documents after saving them to disk for the first time. When you see Document displayed, this means you haven't yet saved your stuff to disk. Do so now!