Step 1: Open the file in Photoshop
Step 2: Drag the design file from your computer folder
Step 3: Drop the design file onto the Photoshop window and press Enter to place the file.
Step 4: Move the design layer to the bottom
Step 5: Select the design layer, go to Edit > Transform > Scale to rotate, scale and adjust the design onto the design template. Make sure to fill the canvas completely.
Step 6: Hide the top layer and save the design in the JPEG format