Solution for this topic

Hi Reuben,

I hope you are well today and thank you for your question.

To achieve this you can configure blog post settings as displayed in the attached screenshot.

You can display background image on single post by adding the following CSS code in the Custom CSS code option of your theme on the below path.

Admin Area -> Appearance -> Theme Settings -> Custom Code -> CSS Code

body.single.single-post {
    background: url("http://edenfestival.co.uk/SITE/wp-content/uploads/2017/03/EDEN_HEADER_CONTENT_RED.png");
    background-size: cover;
}

body.single.single-post .sh-header,
body.single.single-post .sh-titlebar {
    background-color: transparent;
}

Best regards,
Shufflehound team