https://www.skillshare.com/en/classes/Secrets-of-Using-Smart-Objects-in-Photoshop-CC-A-Graphic-Design-for-Lunch%E2%84%A2-Class/2078005525

Smart Objects are a feature of Photoshop that have a myriad of uses for everything from making patterns, and using mockups to photo editing and collages. In this course I'll introduce you to working with Smart Objects and show you how you can use them in your workflow. I'll also explain some issues you might encounter when working with Smart Objects and how to recognize and resolve these problems. While this class focuses on Smart Objects, as with all the Graphic Design for Lunch™ classes, you will find plenty of additional tips and techniques that will be helpful when using Photoshop day to day.