Tidy up Your Taskbar
If you work with a number of documents open at once, the Microsoft Windows® taskbar can become cluttered, displaying an icon for each document. To un-clutter your taskbar, change your settings so that only a single icon is displayed on the Windows taskbar for each Office program.
1. On the Tools menu in your Office program, click Options, and then click the View tab.
2. Clear the Windows in taskbar check box.