You can customize the default appearance of links in Autodesk Navisworks. In particular, you can draw them in 3D, and you can add leader lines (arrows) pointing to the attachment point on the items. You can also choose how to represent each link category (as an icon or as text).
By default, links are attached to the default center of the item's bounding box.
You can override this with more convenient attachment points. If you add more than one attachment point, the link is displayed attached to the closest attachment point to the camera during navigation. This allows you to set up links so that they are always available for following when drawn in 3D mode during navigation, and do not disappear behind objects.