By That Photography Spot on youtube.com
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This step covers the use of smart objects in Photoshop. Smart Objects are layers that can be resized without losing resolution, and they can be edited even after they've been added to an image. Smart Objects also allow you to stack filters and edit them after the fact. In this step you'll learn how to create Smart Objects, how to resize them, and how to edit them after they've been added to an image. You'll also learn how to open the Smart Object layer in a new document and make changes to the layer without affecting the original image.