
Originally Posted by
GrumpyDiver
Susan - Nicely said in general you can't unless this is a feature of the code running on your website. Even if it is, this feature is extremely easy to defeat. The bottom line is that if you don't want to risk having your images used without your authorization, then don't post them.
The best advice I can give on protecting your images is to post low resolution images (a maximum dimension of 1600 pixels) will at least limit what the person stealing them can do with them. Embedding copyright information in the image is also fairly easy to do either in camera or with editing software (and I include this in all the images I post on line). At least you can go after the person who has stolen the image and prove that they have no right to your image.