lcoates68 said:A datum embedded in a group is not the same as embedded in the feature. It is a waste of time to have to navigate the tree just to modify a dimension which you should be able to select on the model itself. Another thing is you end up with unnecessary clutter in the tree from these datums. A third point is if you want to group your feature with other features you must ungroup the datum/feature first (you can't group groups). And no 'swcalvert' it is not the same as 2001!