Select the 3db file in PARTproject, select the 3db file in the project selection [Project selection].
--> On the right, the preview is
opened.
Select a face on the part.
Call up Area [Face] in the context menu.
Important
If a face is
published, there is a chance that it may no longer be able to be
displayed at a lower Level of Detail. In order to avoid this, the LODs
must be defined manually and not automatically.