The Replace and Replace Mode commands replace one item representation in the design with a different representation and change the value of the "type" attribute for the design item. To replace an item using these commands, you must claim that item.
Replace Mode
The claim status check takes place as you move the pointer over the target. If the target is not claimed, the target is not highlighted as a valid replacement target.
Find and Replace
Items that are not claimed can be found, but they cannot be replaced. The Replace button is not available if an unclaimed item is selected.