Blogger announced a couple of months a go that they added the “reply” to comment function that we all waited for for so long. The only catch is that for custom templates the activation is a little bit more tricky.
I will walk you through all the steps needed, but before doing anything you need to backup your template. What we will be doing is reseting the blog section, that includes the blog title, date, comment area and navigation links. Everything will be reset to default so you will lose all of the customizations and your post signature (if you have one). The good thing is that since you will have a backup of your template, you can add all of the customizations after the “reply” button is activated.