This desktop button actually dates back to Windows 7. On the bottom-right corner of your page, there’s a secret desktop button. Don’t see it? Look all the way to the bottom and right, to the side of the date and time. There you’ll find a small little sliver of an invisible button. Click that and it will minimize all your open windows to clear the desktop. You can change the behavior of this in Settings, between having to click or just having to hover the mouse over the corner.