Leaders
In SolidWorks, leaders are available with all annotations that use leaders. You can choose straight, bent, or multi-jog leaders. You can also create multi-jog leaders separately, and you can add multiple leaders.
When an annotation moves, the leader attached to the annotation moves with it. The leader also moves with any model to which it is attached.
See SolidWorks Tutorials: Advanced Drawings
Related SolidWorks Topics
Dimension Display
Dimension Leaders/Text
Leader/Text Display for Chamfers
Multi-jog Leaders