For our products, we would like to give users the option of adding something to the designated upload area, but do not want to require that they add something to the upload area. The problem is that if they don't add something, their design will have our default image that says "add photo here"..
Therefore, please add an option that allows the user to delete the upload zone area if they do not wish to add a photo to that area. Allowing them to delete the upload zone would also delete the default photo that is displayed by default for that designated upload area.
Or, just don't consider/show upload zone default images as part of a design in previews, PDFs or print ready exports.
Or, give upload zones a required/optional toggle.