I don't believe it is, however you may find some help on Ken Rockwell's d5100 run down.
Learn to shoot for crop. It's what we had to do back in the film days and it's really easier than you think. I always prepare for an 8x10 crop in camera-and I tend to over do that with full frame a bit. I know I am safe with just about anything else if I plan on losing 2 inches off the long side.