DCO Post Validator
Allows you to make post, page, custom post elements required: title, content, featured image.
After installing the plugin, you need to go to the Settings -> DCO Post Validator to specify the required elements.
- Go to Plugins > Add New.
- Type DCO Post Validator into the search form in the top-right of the screen.
- On the search results that appear, click the Install Now button next to the plugin title.
- Click Activate to activate the plugin.