I spilled a soda on my keyboard and laptop. I immediately wiped it off. In the process, I did something funky to my computer and I do not know how to undo it. I have a black, rounded-corner box in the bottom left-hand corner of my mac. It tells me where I am and the actions I am taking. I don't know what this is but I don't want it there. Can someone please tell me how to undo this? I think I got a message saying "you are on another volume" at some point. What does that mean? I am also getting a black outlined box that appears.