Thumbnail image in open cart

Hello,
I’m using watermark on my upload images in website and those watermark on images are applied to thumbnail as well but I really don’t want watermarks on thumbnail images.
Can anyone advise me a solution for this

Depends on how you are adding watermarks to your images

Hello
Thanks for your reply please note water mark just covers my whole product so no one can copy it and I want to make sure that can I upload thumbnail separatly?

Something like this extension: https://www.opencart.com/index.php?rout ... n_id=31656