From Graphene Theme Documentation
This options group allow you to configure where the comments feature should or should not be displayed.
- Use Wordpress settings
- This setting will use the settings from two locations. First, the "Allow people to post comments on new articles" option in WP Admin > Settings > Discussion page, and from each individual post/page under the "Allow comments" setting.
- Disabled for pages
- This setting will override the two settings mentioned above, and will completely disable commenting on all pages (not posts).
- Disabled completely
- This setting will override the two settings mentioned above, and will completely disable commenting for BOTH pages AND posts.