I just discovered an interesting mouse gesture trick for WIN7

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I just discovered an interesting mouse gesture trick in WIN7. If you have several windows open at the same time, point the cursor on the upper edge (title bar) of one of the windows, hold down the left mouse button, and then drag this The window shakes slightly on the screen a few times, and the window behind it will magically disappear. Don't panic, as long as you shake it two more times, the window at the back will come back. Haha, I wonder if Mars is.