Manual measurements class. The class supports creating and handling of manual measurements. Types of manual measurements. Manual measurements features can be simple (Line, Manual tag, Polygon, Circle, Polygonal line, Angle) or compound (Best-fit circle, Pitch with line, Best-fit line). Manual measurement features are saved in McMMFeature class accessible through Measurements.Data.Item() property. Every feature contains one (simple features) or more (compound features) sub-features (McMMSubFeature class). The number of sub-features is corresponded to the number of lines in the data table. SubFeatures can be accessed either from McMMFeature.SubFeature(Index) property or directly from Measurements.Data.SubFeature(Index) property. Derived measurement (Angle between lines) is created based on existing line sub-features.