Watermark and right click disabled code

Hi, can anyone help me.  I have a Commerce Advanced plan.  Want to protect my images with a watermark and disable right click. Is there a code that I can use to encompass both?  I have images in gallery and grid blocks.  Many thanks.  (I am not a developer, just a normal person so please excuse basic questions from me.)  

If you want to add an effective watermark it needs to be on the uploaded image. Adding in a pseudo watermark would not reflect on a downloaded image, and therefore just make your photos look bad without any benefit. The other good tool to protect your images is to have them as low a resolution as you can get away with and as high a compression as you can use.

You can use this to prevent right-clicking:

https://beaverhero.com/squarespace-disable-right-click/

None of this is effective against someone determined to use your image without permission, but at least you'll make them work for it!

Thank you for replying, the right click disabling worked, yaay. 

For the watermark, you mean you have to upload into a Squarespace gallery an image which already has a watermark?   Which is a pain because all my images are already on the site.  So if some code can be added so the images are watermarked on the site, and right click is disabled, then any screenshots will have the watermark, right?

Anyone who wants to steal your images will download them from the code, having a coded overlay will do nothing to protect your images, it will only make your images look bad.