We were asked to submit this as an enhancement in case C11572526.
"When Reference Designators are added or removed from a part, this changes the quauntity of the of the used part. In previous releases, there used to be a confirmation window that would bring this to attention and have the user acknowledge the change. In 10.1 this is not case. The change is quietly persisted. We are requesting a new configurable setting that can be used by sites to turn the Confirmation ON or OFF depending on their practices"
To add or edit a reference designator for an occurrence of a part, use the following procedure:
Select the Uses tab in the right pane.
Enter a value in the Reference Designator column.Use BOM view to edit the reference designator as a range. If the quantity of the part is increased or decreased as a result of editing the range, a window appears asking if you want to adjust the quantity of the part accordingly.orUse occurrence view to edit each individual reference designator