Protecting Photos so they can't be re-used/reposted?

Is there a way to block photos so that they are only posted? What if you want to show others your art, but you dont want the art to be used by someone

Is there a way to block photos so that they are only posted? What if you want to show others your art, but you don't want the art to be used by someone else?

or:Is there a way to block photos so that they are only posted? What if you want to show others your art, but you don't want the art to be used by someone else?

or:Add a water mark to you digital copy and use that one to show.

or:If a photo appears on the internet, anybody can save it and use it someplace else. The only thing you can do is to add a watermark . Like this:www.tipsotricks.com/2012/07/5-top-free-software-to-watermark-your-images.html

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