I suggest you to read this - Readers can't comment on your blog - Tip For You
With a very little change to your template you can add this hack to your blog.
This hack was originally posted on thisischen
ScreenShot :
Adding Comment Replies to your blog.
Step [1] In your dashboard Click 'Layout' > 'Edit Html'> Tick the 'Expand Widget templates' box.
Adding Comment Replies to your blog.
Step [1] In your dashboard Click 'Layout' > 'Edit Html'> Tick the 'Expand Widget templates' box.
Step[2] Find the following code in your blogs Html :
<data:commentPostedByMsg/>
Step[3]. Paste the following code Directly Below/After
<data:commentPostedByMsg/>
<span class='comment-reply'><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=400,height=450"); return false;'>[Reply to comment]</a></span>
Important !
In order to make this work you must add your blog Id .
What is your blog ID??
Simply go to your layout page, posting page or any of the pages and copy your I.D. from the address bar at the top of the page.
Replace [Reply to comment] With text of your choice like [Reply] or [reply back] OR you can add image instead of text By adding only image tag Like
<img border="0" src="http://2.bp.blogspot.com/_nqp-0VCwy0c/S_OfySBzXrI/AAAAAAAABIo/xs7lK1AOeJw/s320/reply-r.png" />





