New documents open in a separate window (in previous versions of Word, a new document took over the Word window). You can switch from one document to another by choosing a document from the list on the Window menu or by clicking the document's button on the Windows Taskbar. To view all open Word documents at the same time, choose Arrange All from the Window menu. You can also switch documents (or applications) by pressing Alt+Tab. To see more rows of buttons on the Windows Taskbar: Position the pointer on the inside edge of the Taskbar (the pointer becomes a two-headed arrow when it is in the correct position), then click and drag its border toward the center of the screen.

There are some other options on the Shortcut tab. You can specify the folder Word points to when it starts (this setting can also be changed another way (see How do I change the default folder for Open and Save?). You can program a shortcut key sequence (click in the Shortcut key box and press the key combination you want to use). In addition, you can set the window size Word uses by default (maximized, minimized, or normal) and you can choose a different Word icon (click the Change Icon button).