Render an include file from anywhere in your Jekyll project
{% render about/_bio.markdown %}
This will import source/about/_bio.markdown and render it inline. Use an underscore at the beginning of the filename to prevent Jekyll from generating an about/bio.html (Jekyll doesn't convert files beginning with underscores).
{% render templates/includes/header.html %}
If you have a folder for your include files that you want to include in your templates and compile using Jekyll, you can include the markup from those files using this tag.