Windows 10 - Switch between the Start Screen and the Start Menu
To switch between the Start Screen and the Start Menu in Windows 10,
click on the Start button (the Windows logo which is usually located at the bottom left of your screen) and
type "start settings" (No need to position the cursor anywhere and no need to click Enter) :

Click on the result that says "Start Settings" (or "Use Start full screen"):

Toggle the switch that says "Use Start full screen" by clicking on it:

That's it. You're done! Now when you click on the start button you'll see what you've selected. (To change back - simply follow this tutorial again.)