The Object Property Editor consists of a set of attributes that can be edited and the location where new attributes can also be added.
In the databases, the properties are stored as follows:
6. Select the Preferred Sizes heading.
7. Select the category you want to add the material to.
8. Select the sub category Material and scroll to the material you created from the Object Property Editor.
9. Select Add to append the size to the Preferred classes.
10. Load Settings in Advance.
11. Go back in the model and Update defaults.
The material is appended to the list