Profile and Alignment Labels
Profile and alignment labels can take on many forms. On an alignment you may want to show labels every 100′ in addition to PC, PT, and PI information. On a profile, you will want tangent grades, curve information, and grade breaks.
For every element you wish to label, a separate style controls the look and behavior of that label.
A label set is a grouping of labels that apply to the same object. In lieu of having one big style that accounts for multiple aspects of an object, the labels are broken out into specific pieces to allow you more control.
Label sets come into play with alignments and design profiles. When you look at an alignment or profile and see labels, you are usually seeing multiple label ...