Usually if copying the text is enable, people may copy your content and publish to earn money. so, we should disable the text copying in blogger.For doing this , Do the following steps:
1. Go to "Blogger Dashboard".
2. Click on "Layout".
3. then click on "Add a Gadget".
4. Then Select "HTML/Javascript".
5. and Then paste the following code:
<script src='demo-to-prevent-copy-paste-on-blogger_files/googleapis.js'></script><script type='text/javascript'>if (typeof document.onselectstart!="undefined" ) {document.onselectstart=new Function ("return false" );} else {document.onmousedown=new Function ("return false" ); document.onmouseup=new Function ("return true" );}</script>
6. Then Click on "Save".
7. And Click "Save Arrangements".
8. View your blog, you will see that the text of your blog is not able to copy.
9. And Enjoy the lust of Life. Thank You