Auto Sphere Target will automatically find and extract sphere targets in your setups. It will then use those extracted targets to create a registration bundle. An option, under the setting menu, can be set for the sphere size used in the field.
Note: Cyclone REGISTER 360 PLUS will always execute a best fit. The Auto Sphere size entry works by adding a size hint to help the extraction, but the size entered does not override the fitted size, it just helps the algorithm. A size of "0" means that no size is set. Setting a size can be helpful if all the spheres are the same size in the project.