This tutorial shows three ways to zoom in or out on start screen using mouse and keyboard
METHOD 1
----------------
To zoom out:
1) Click on the - icon in the lower-right corner to zoom out
To zoom in:
1) Click on a blank area to zoom in
METHOD 2
----------------
To zoom out:
1) Press and hold Ctrl key and scroll down with mouse
To zoom in:
1) Press and hold Ctrl key and scroll up with mouse
METHOD 3
----------------
To zoom out:
1) Press Ctrl + Minus sign to zoom out
To zoom in:
1) Press Ctrl + Plus sign to zoom in