I have started using ‘covers’ at the head of my posts, but the image doesn’t show on the blog page – just the title. Is there a setting to remedy this please? One that doesn’t include creating a ‘header’ as such.
Doesn’t look like you have added a featured image to that post.
By adding the featured image, you can then create a single header element, and set the background image to Featured Image and then set the Display Rules to all posts.