Are you guys talking about in a browser, where it zooms in/out the text? lol noobs.
You can also hit Alt+F4 to close an app quickly, and ctrl V to paste
CTRL + D will minimize
everything. Man discovering that when I was 14 = clutch
As far as the browser zoom goes, yes, it's very useful, especially as you use larger monitors. You can even set it to zoom just text. In firefox you just go in view-> Zoom.
To do it In IE you simply navigate to
www.firefox.com install that quickly add on and then go from there.