It took me a minute to figure it out but its really neat☺
As a writer, this is a real help. I no longer have to go to the Insert icon and then click through a couple of portals to hunt for the special symbol I need.
¡ and ¿ are ones I use a lot and this will allow me to go on without losing my train of thought.
I found this on Google+ and am sorry that I didn't remember the name of the one who posted it.