Smart Dimensions is a tool used in AGACAD's Wood/Metal Framing, Precast Concrete, and Smart Views applications to automatically get dimensions of elements in the view. The tool may be used while creating views automatically through the configurations of those solutions, or it could be applied in any user-created Revit view.
You can access Smart Dimensions' configurations through Smart Views' configuration window:
Alternatively, you can go straight to Smart Dimensions menu and configurations:
Once you have prepared the configuration, you can apply it to any view:
Alternatively, you can add the configuration that you set in Smart Dimensions to Smart Views' configuration, and it will be applied to selected views while using the Create Views command in Smart Views.