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