This article explains Smart Objects in Photoshop and tells the different types of smart objects & how to create, edit, and convert them.

How to Add an Object to a Picture in Photoshop CS3. Compositing multiple images in Adobe Photoshop CS3 to create montages or photo illustrations for your business or its clients entails combining ...

Prepare the photo In Photoshop, choose File > Open as Smart Object and navigate to the soon-to-be-painterly photo.