Change reference system
Select a point on the model and click on add to insert your new coordinate.
You need at least 3 points to apply transformation.

     Point (X, Y, Z)                    New coordinate                Options

Add 3D model

Select the model you want to import and then, choose 3 points to join it.

Select 3 points to join it
to another 3D model.
Add 3D model

Selecciona un modelo y después muevelo hasta la posición deseada para compararlo.