From the standard area area of the action bar, click Views Management.
You can also right-click the 3D shape and select PartBody object > Views.
The 3D view (folded view) is the current view. This
means that the part is currently folded.
Select Flat View.
Select one of the following options:
Current: Makes
the flat view current and unfolds the part.
Deactivate: Deactivates the flat view and makes it impossible to unfold
the part. Since only the folded view is computed, the part
will take less time to load.
Note:
To enable the flat view again, click Activate.
.