While Working on Her Computer, Robin Opens and Uses One

Essay

While working on her computer, Robin opens and uses one program after another. As she uses each program, she creates and saves a document before opening the next program. She keeps the program and document window open in case she needs to return to that program and document. Occasionally, one program document becomes hidden behind another program window and she can't find the program and document she needs to use. As a result, she sometimes opens the same program and document twice in two different windows. Robin's edition of Windows Vista supports Windows Aero. Name one Windows Aero feature that she can use to help her locate a program and document she previously opened?