Insert your work.
Double-click the Smart Object thumbnail in the layer called “YOUR DESIGN HERE.” A new file will open, showing the gradient image. Drag and drop your web page design onto the file, use the Move tool to resize it if needed, and hit Return to Place the image. Save it, and head back to the main file to see your work in place. To make any adjustments, make sure to use the Smart Layer file and save it every time to update the mockup.