My cursor on my Macbook Pro has a box around it that enlarges everything One day I was surfing the web when suddenly a large clear square appeared around my cursor!

I honestly don't know what to do about it, but it seems like there could be a simple fix.

You can see in the picture below what the box around my cursor looks like compared to the normal screen.

Is there something I can reset or do to clear the box that encircles my cursor?
Could this be the Zoom accessibility feature?

It can be toggled with Alt-Command-8.

Also see System Preferences => Accessibility => Zoom for more details and options.