Default Planes
The default planes are the , and planes located in the model window's origin. These planes exist in all part models and assemblies.

By default the default planes are hidden when a new model is created. With the keyword baseplanesvisiblewhencreated you can change the visibility of default planes in a new model.
| baseplanesvisiblewhencreated | Description | 
|---|---|
| 0 | The planes are hidden (default). | 
| 1 | The planes are visible in a part model. | 
| 2 | The planes are visible in an assembly model. | 
| 3 | The planes are visible in both part models and assembly models. | 
In addition to the default planes, new planes can be created and positioned to a line or a face, for example.
You can use planes as tools for modeling features in parts and positioning parts in assemblies.
