The option allows you to use an existing Tetin file as a reference to map the mesh setup and other parameters to the loaded geometry file. This is important in parametric modeling, as the setup that is done for one Tetin file can be reused for subsequent design changes.
The parameters that will be read from the reference geometry file include:
Global Meshing parameters
Entity meshing parameters
Prism meshing parameters
Part names of entities
Dormant curves and points
Density regions
Connector definitions
Geometry subsets
Periodicity