To hide all the visible windows and reveal the desktop, press the F11 key:

The hidden windows will not be accessible until you show them by pressing F11 again.

Hiding windows is especially useful if you want drag-and-drop a file on the desktop into an application you have open. To do this, press F11 to hide all windows, Left-Click on the file on the desktop and, with the mouse button held down, press F11 to show all windows. Still holding the left mouse button down, move the mouse over the window of the application and then release the mouse button.

You can also configure TopDesk to use a key other than F11 or a mouse hotspot to hide all windows. For more information, visit the configuration help page.