hacks-guide-minimal-mistake.../example/_posts/2012-03-15-layout-header-overlay-image.md

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2016-09-22 04:13:25 +02:00
---
title: "Layout: Header Image Overlay"
header:
overlay_image: assets/images/unsplash-image-1.jpg
caption: "Photo credit: [**Unsplash**](https://unsplash.com)"
cta_url: "https://unsplash.com"
categories:
- Layout
- Uncategorized
tags:
- edge case
- image
- layout
modified: 2016-05-02T11:39:01-04:00
---
{% include base_path %}
This post should display a **header with an overlay image**, if the theme supports it.
Non-square images can provide some unique styling issues.
This post tests overlay header images.
## Overlay filter
You can use it by specifying the opacity (between 0 and 1) of a black overlay like so:
![transparent black overlay]({{ basepath }}/assets/images/mm-header-overlay-black-filter.jpg)
```yaml
excerpt: "This post should [...]"
header:
overlay_image: assets/images/unsplash-image-1.jpg
overlay_filter: 0.5 # same as adding an opacity of 0.5 to a black background
caption: "Photo credit: [**Unsplash**](https://unsplash.com)"
cta_label: "More Info"
cta_url: "https://unsplash.com"
```
Or if you want to do more fancy things, go full rgba:
![transparent red overlay]({{ basepath }}/assets/images/mm-header-overlay-red-filter.jpg)
```yaml
excerpt: "This post should [...]"
header:
overlay_image: assets/images/unsplash-image-1.jpg
overlay_filter: rgba(255, 0, 0, 0.5)
caption: "Photo credit: [**Unsplash**](https://unsplash.com)"
cta_label: "More Info"
cta_url: "https://unsplash.com"
```