
Blogger is an amazing free service by  Google. By Default, Blogger does not provide such functions which could  satisfy need of everyone. So, time by time, developers develop several  scripts and hacks for blogger to enhance the blogger experience and to  take blogger next level. Here is another useful blogger hack/trick. Now,  you can add a “REPLY” link with each comment posted on your blogspot  blog, so that people will be able to reply any of existing comment  easily. It was earlier built for wordpress. So, Simply to enable this  feature in your blog, read below given instructions.
Follow These Instructions:
- Login to Your Blogger Account
- Go to Dashboard > Design > EDIT HTML
- Get Your Blog ID, You will be able to see your blog ID in URL address bar. for example, see this picture

- Simply Copy Your BLOG ID
- Now, Find This Code
<data:commentPostedByMsg/>
- Just after above code, past new below code
<span><a expr:href='"https://www.blogger.com/comment.g?blogID=YOUR-BLOG-ID&postID="  + data:post.id +  "&isPopup=true&postBody=%40%3C%61%20%68%72%65%66%3D%22%23"  + data:comment.anchorName + "%22%3E" +  data:comment.author + "%3C%2F%61%3E#form"'  onclick='javascript:window.open(this.href,  "bloggerPopup",  "toolbar=0,location=0,statusbar=1,menubar=0,scrollbars=yes,width=450,height=450");  return false;'>[Reply]</a></span>
- Dont Forget to Change YOUR-BLOG-ID with your Blog ID that you searched following above instructions.
- Save Your Template
- Thats it !
