What is the effect of using a leader line in technical drawings?

Using a leader line in technical drawings serves the specific purpose of pointing to an object that is being referenced, along with any added dimensions, notes, or details related to that object. Leader lines are typically drawn at an angle and connect the feature being described to the accompanying text or dimension, ensuring clarity and preventing misinterpretation of the drawing. This use of leader lines enhances the overall effectiveness of the technical drawing by organizing the information and making it easier for the viewer to identify which parts of the drawing correspond to the accompanying notes or dimensions.

Other choices relate to different aspects of technical drawings. For instance, indicating the scale of the drawing is typically achieved through a scale bar or title block rather than a leader line. Defining boundaries of a section is more commonly done using section lines or borders, while showing the direction of a weld usually involves specific symbols or arrows rather than a leader line. Each of these functions serves its purpose in enhancing the clarity and utility of technical drawings, but it is the leader line that specifically provides a direct link between an object and its annotations.