Leader Lines and Arrowheads

Leader lines are fine lines terminating with an arrowhead or dot at one end to relate a note or callout to its feature. They are often drawn at an angle or straight from the principal lines on the drawing or in a free-curved manner to distinguish them easily from object lines.

Leader lines are used to label elements by connecting an object to a note or abbreviation or a dimension to the object it represents on a drawing (Figures 3.8A, B, and C).


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