This post should display a header with an overlay image and custom tagline, if the theme supports it.

Non-square images can provide some unique styling issues.

This post tests overlay header images with custom page.tagline.

tagline: "This is a custom tagline content which overrides the default page excerpt."
  overlay_image: /assets/images/unsplash-image-1.jpg
  caption: "Photo credit: [**Unsplash**]("