I have looked throughout the online help and seem to be having troubles creating a skyline. My goal is to see if building envelopes of various heights will break the skyline from a road. I have converted the road into points to use as observation points but I am missing something. Are there a number of fields I need to add? I can create viewsheds from various heights off the ground but never used the skyline tools. How can I find out more about how to use these skyline tools?