When you have multiple photos and want to apply the same design to all them – for example, a white background to make your store more professional – batch mode is the best solution.
This is the best way to batch edit:
Start from a photo with the "+" button.
Tap the "multiple" button.
Select your images.
Select the best template for you.
Alternatively, you can access this feature on your "My Content" page, or the Edit page from a template you created. Here is how to do that:
Select "apply to multiple images"
Select the images you'd like to import
Edit each image and go to the next one by clicking "next"
Export your images