Summary
The class manager allows users to control which objects should be assigned to a grouping of properties.
Assign Properties with the Class Manager
1. Launch the Semantic Panel
Semantic can be activated by typing in “SemanticPanel” in the Rhino command line. This will activate a dockable window for managing properties.
![](https://apps.provingground.io/wp-content/uploads/sites/2/2021/03/SemanticStarterWindow-571x1024.png)
2. Activate the Class Manager
The “Class Manager” is where groupings of properties are managed by the user. The user assign an object to a “Class” so that object can inherit the property fields.
Semantic starts with some default classes – for objects, an Internal class will expose computed geometry values, such as area and length.
![](https://apps.provingground.io/wp-content/uploads/sites/2/2021/03/Semantic-Classes-Default.png)
3. Assign a Rhino Object to a Class
Select some objects (in this case surfaces) and choose to “Assign” them to the Internal class.
![](https://apps.provingground.io/wp-content/uploads/sites/2/2021/03/Semantic-Assign-1024x455.png)
By assigning the objects to this class, the objects will have the Internal properties (in this case Area) reported in the Semantic UI.
![](https://apps.provingground.io/wp-content/uploads/sites/2/2021/03/Semantic-AssignedInternalObjects-1024x620.png)
Selecting “Clear” will remove the values from the objects.