Bulk Editing Comments
There is not a way to turn comments on or off for all published posts and pages at once. However, you can use the bulk edit feature to change many posts or pages at a time.
- Go to the Posts → All Posts screen in your blog dashboard.
- Select the posts you would like to modify or check the box next to Title column at the top to select all posts on that page.
- Select Edit from the Bulk Actions drop down menu.
- Click the Apply button.
- Change the options for Comments to Allow or Do not allow.
- Click the Update button.
- Repeat with your Pages.