This form is displayed when you press the Details button on the Import 3D form. It gives you a preview of the 3D image together with other some information.
Import 3D Details - General
This page displays some general information about the file.
Import 3D Details - Summary
This page displays a summary of the 3D drawing objects.
Import 3D Details - Contents
This page displays the 3D drawing contents in a tree-view style.