Select the geometry model from the Select Model list.
To upload the 3D model from your disk, select Upload 3DS.
To choose a model you already created in a previous step, select Existing Model.
When the checkbox "Use File Dimensions" is activated, the dimensions of the 3DS model will be used.
To use one of the default primitive types, select New Cube, New Cylinder, New Sphere.
To use one of the GDTF default models, select New default Base, New default Yoke, New default Head, New Scanner, New Conventional or New Pigtail.