How to Enable Google+ Comments for Blogger even Using Custom Template?

Google+ Comments is an best alternative to the default commenting system on Blogger, available to blog authors who have upgraded their Blogger profile to Google+. Google+ Comments look similar to traditional Blogger comments, but have some important differences with more features.
How to Enable Google+ Comments for Blogger
How to enable Google+ Comments for your Blogger blog?
  • Goto Blogger dashboard
  • If you haven’t upgraded your Blogger profile to a Google+ profile and would like to do now, you can start the process by clicking the Google+ tab on the Blogger dashboard.
  • Once your blogs linked to a Google+ profile, a new setting's will be displayed on the Google+ tab of your blog. 
  • Just check the "Prompt to share after posting" and "use on this blog" check boxes.
  • That's it you have successfully enabled Google+ comments for your blog.
How to Enable Google+ Comments for Blogger

If you are using custom template on your blog, Just follow the steps to add the Google+ Comments box widget in your template:
  • Go to blogger dasboard > Template > Edit HTML > Format Template and find the below code
<div class='post-footer'> 
  • Just below of it, paste the following code
<div class='cmt_iframe_holder' expr:data-href='data:post.canonicalUrl' expr:data-viewtype='data:post.viewType'/>
  • Click on Save template button, That's it.
Unfortunately, we cannot guarantee the experience with heavily customized templates.

Important Notes for Blog Authors from Google

1. What happens to existing comments when enable Google+ Comments?
  • If you use Blogger’s commenting platform, existing Blogger comments will stay on your blog, and you’ll continue to have the option to delete or mark them as spam.
  • If you use a third-party commenting system, such as Disqus or any other, sorry your comments will not be retained when you enable Google+ Comments.
2. What if readers does not have a Google+ profile or page? Can they still comment?
  • Sorry , your readers must have Google+ profile or page, when they attempt to comment.
3. How to Moderate Google+ Comments?
  • you can moderate comments within the blog post itself. The Comments tab that you previously used to moderate comments will be removed from your Blogger dashboard.
  • You can moderate comments by clicking on the drop-down arrow next to the comment, or by hovering over the comment and clicking the "X" that appears.
  • Automatically hide the spam comments, and you can review and edit them in bulk.
  • As a blog author, you can choose to remove comments from your blog if that comment is shared publicly, or with you. However, if that comment is also shared in Google+, you won’t be able to remove it from Google+.
Source
Powered by Blogger.