Hey there @pantherheaddesigns,
Welcome to the Community!
Are you currently using a specific app to add watermarks to your images? If you are, you could check if it's supported by Zapier over here: https://zapier.com/apps
If not, You can browse through our selection of image and design apps in the App Directory here. There might be an app that has an action you can use in your Zap to add a watermark to your image: https://zapier.com/apps/categories/images
Also, take a quick look at the Content & Files apps in general as there could be an app that's perfect for this purpose: https://zapier.com/apps/categories/content-files.
Let me know if you need any further assistance!
I’ll check it out! Thank you!