With Delete Old
This is the default option.
To transfer the ownership of a part to the active part:
1. Press PARTS 1.
2. Pick Delete Old in GATHER PRT.
3. Identify the part to be gathered or enter its name. You cannot gather a part from above the level of the active part.
Creo Elements/Direct Drafting then transfers the part to the ownership of the active part and deletes the original.