I have added a picture for linking a coordinate system to the center of mass.
Which you can use to place dimensions on to, you can ofcource also use that coordinate system in your draft to place dimensions there.
For me personal it doesn't really matter as we barely use it, it's also an unimportant point for me to add to my big list if ER / PR . If anybody makes one i will support it and add my company to it.
I can't image that nobody made an ER about it once.
is there really a need for a dimension to COM witihn the 3D file.
In draft You atumatically can put a defined block onto the COM, where You can see the COM better than any point in 3D and where You can dimension to in any view You like.
@bshandI saw his snap was from a 3D model. But when i use COM it goes with a 3D pdf towards a costumer