Final answer:
Local notes, or callouts, in technical drawings often use outline lines to define specific features or shapes within a design.
Step-by-step explanation:
Local notes, or callouts, apply only to certain features, so they most often use an outline line. An outline is the simplest of various types of lines; it creates a path around the edge of a shape and works to define the shape. This principle is used in technical drawings and engineering to clearly specify the boundaries and important details of an object or a feature within a larger design.