Adding an Item to another Case (1 Item belonging to multiple Cases)
Click any number of item(s) and Choose Add to Case from the Actions menu to add the item(s) you’ve chosen to a particular Case.
The Add Items to Case screen will then be shown.
Enter a Required Case Number in the Case Number field. As soon as you begin typing a Case number, selections will appear to choose from. Pick 1 and click Ok.
Your Item(s) will then be added to the Case you chose.