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Show Desktop Button

You can use the Show Desktop button to minimize all open windows and show the desktop.

To add a Show Desktop button to a panel, right-click on any vacant space on the panel. Choose Add to Panel, then choose Show Desktop from the Add to Panel dialog. See Section 4.3.2 ― Adding an Object to a Panel for more on this.

To minimize all windows and show the desktop, click on the Show Desktop button. To restore all windows to their previous state, click it again.