When uploading sketches to jpg or any other formats.. does anyone know of a good software program that will add a watermark to the image / sketch for copyright purposes and / or so that no one can copy / download the image?

Thanks

This link discusses this topic.
Forum link

you may find some other info using the Drawspace search feature and the key word "watermark".

All the best,

a friend of mine uses a clear top loading report/ binder page..once created it is always ready to use repeatedly

hope that helps