The objects in the sysHB library are the configurable preferred shapes for the Head and Body Tool. The default library contains 13 such objects, but you can freely add the new ones, or modify the existing ones.
About the sysHB library object names
You can define the names of the objects in the sysHB library as you want, except one detail - the dimensions for which the library shape will be available. See Limiting the number of columns and height for the sysHB library objects for the details.
The names in the popup menu are automatically sorted as A-Z.
Limiting the number of columns and height for the sysHB library objects
See Limiting the number of columns and height for the sysHB library objects
About structure of the sysHB library objects
About the Tool of the sysHB library objects
All the sysHB library objects have the particular Tool attributes applied. Those attributes are essential for the proper functioning of such library objects. Look at the Tool settings in sysHB objects chapter to learn how the Tool attributes are set on the default objects, and to understand which settings you have to apply on your custom objects.