You can create a new item and attach an existing item to it at the same time.

1. Click in the column next to the item that you want to attach. Hold down CTRL and click to select multiple items.
   
2. Go to Attach To > New Item.
   The Attach Selected Items To Container window will display.
3. Select which new item you want to create.
4. Select where you want to create it.
5. Click OK.
   A window will display to create the new item.