If your taskbar is on the bottom, there should be a little rectangle on the right side. Clicking that will minimize all open windows. Does that provide the function you need?
I remember when I first upgraded to Windows 7, if I double-clicked on the desktop, icons would disappear, and if I double-clicked again, they reappeared. Was I dreaming?! It doesn't happen anymore and I can't figure out how to enable this feature. I find it useful when using a screen capture like snipping tool to save pictures. Thank you for any help.

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