I downloaded a website showcase mockup, which uses smart objects for the screen layers of a monitor and a smartphone to make it easier to place designs. I need to decrease the size of the smartphone screen layer but am finding that when I do this and then paste a website design, a blank border around the image is added in the final mockup instead of the image being stretched to cover the whole layer.
I don't have much experience in using smart objects, so any help would be appreciated.