To configure comment settings on a specific content type:
1. Navigate to the Content types administration page (Manage > Structure > Content types or http://thirstysix.com/admin/structure/types).
2. Find the content type you want to enable and click the "Edit" link.
3. Click the "Manage Fields" tab.
4. Add a Comment field. Click "Edit" next to the Comments" to edit the comment settings.
5. Here you can specify several different settings
Configure a label text, Help text, Default Value setting for new content, Threading, Comments per page, Show reply form on the same page as comments and Preview comments