How Can I Prevent People From Copying The Photos On My Blog?

In a word - you can't!

There are several codes out there for disabling right-clicking but there are still other ways that your blog photo can be copied.

Watermarking your photos has been suggested but even this method is not 100% foolproof because the photo can still be copied. Watermarking is adding an extra layer to your photo where you can put copyright information such as copyrighted by< etc. This can be done using some of the 2D graphics programs.

Another suggestion has been to make a thumbnail of your photo - but again it can still be copied!

Yet another suggestion that I have seen is that you make your photo a sort of jigsaw puzzle and upload it in pieces - this is complicated to do and still it doesn't stop it from being copied!

The only foolproof method is to not put the photos on your site - Sorry!