To achieve this, you will need to follow the steps you usually follow:
Click on the upload button to choose the image you want to edit.
2. Set scene background:
Once you have uploaded, press on the image to view the editing bar. Here you will spot the 'color' icon.
Once you click the 'color' icon, you will be able to see the list of background scenes you can apply to your image.
You can also apply this setting to all the scenes of your video, without having to revisit again.
Once you're done, you will be able to view the image in white background.