Featured Images Do Not Work

Thanks for an extremely useful plugin! It was easy to modify the footer.php of the Gazette Theme!

But, I have run into trouble with featured images (header images) for both posts and pages. Instead of covering the entire screen-width (with page-title overlaying the image), the featured image now appears as part of the post or page, covering only the post-width, and with the page-title underneath.

How can I make the child theme allow me to use the parent-theme’s featured image feature?

Please help!

Abhijeet