1, open the computer, enter the software, import the video to be processed, and you will see the following picture, and select the picture as the background.
2. After selection, drag the background image to the video track area, as shown in the figure below.
3. There is an expanded symbol of "Option" below, click it with the mouse.
4. After clicking, you will see the following picture. Select "Properties" in the options, and then check the "Deformed Material" option.
5. That's it. You can add background pictures to sounds and shadows.