How to Navigate Windows 8.1 with a Mouse and Keyboard
Click the down arrow at the bottom left of the screen.
You see the oddly organized list of all your programs. If you followed along with the finger-based exercises, you should see a pattern here.
Click in the lower-right corner. There’s a tiny icon down there — it looks like a minus sign. The effect is the same as pinching the screen with your fingers.
To get back to the Start screen, press the Windows key on your keyboard.