Dimension in Model Space and Paper Space
Dimensions and Tolerances
Create Leader Lines
A leader is a line that connects some annotation to a feature in a drawing. Leaders and their annotation are associative, which means if you modify the annotation, the leader updates accordingly. Don't confuse the Leader object with the leader line AutoCAD automatically generates as part of a dimension line.
For more information about leaders, see “Create Text with Leaders” in the User's Guide.