I have a 19" Dell Monitor.  Unfortunately before I left the office tonight, I forgot to write down the model. 

Late this afternoon, I walked away from my desk and when I walked back to it saw that everything on the monitor was SIDEWAYS.  I could not get it to go back and only by bending my head to the side, could I manipulate the cursor so I could send the last email that had to go out tonight, and then I had to manually turn the computer off a I couldn't use Start (couldn't really find it).

I tried the buttons on the right side of the screen, but because I didn't know what I was looking for, I wasn't able to get it to go back.  Does anyone have a clue how I can fix this?