Smart Objects function is discontinued in Dreamweaver version 21.0.
Photoshop images are inserted as Smart Objects in Dreamweaver. The Smart Objects stay linked to the original Photoshop images. When users edit the image in Photoshop, they view an updated image in Dreamweaver. A Smart Object has a specific state, mainly resulting from the connection of the web image to its original asset file. Users can view the status of a Smart Object visually. The sync state of a Smart Object is indicated with the Sync badge.