Prestashop questions about image watermarks

Prestashop itself has a watermark module for protecting images. Mine is WatermarkV0.1,

After installation, you can set the watermark, such as the position and image type.

However, you must go to back office> preferences> image after setting

Re-generate the image so that the watermark can be added to the old image, and the new image will automatically add the watermark.

The image can be regenerated for a long time if there are too many images. Pay attention to the timeout restrictions and whether to delete the previous images,

If an error occurs during generation, you can perform the restore operation.