Github Project Pages usage

1.Go to your github repository

For example: https://github.com/EvanLi/project-pages-demo

2.Click Settings and find Options-GitHub Pages

In the Source tab, choose master branch. Or you can choose master branch /docs folder. Or create a gh-pages branch and use this branch.

3.Choose a theme(Optional)

In the same place of step2, you can choose a theme of your Project Pages(or edit the _config.yml file manually), which is optional.

For example:

_config.yml:

theme: jekyll-theme-minimal
title: "The title of your site"
description: "A short description of your site's purpose"
show_downloads: true

_config.yml:

theme: jekyll-theme-cayman
title: "The title of your site"
description: "A short description of your site's purpose"
show_downloads: true

_config.yml:

theme: jekyll-theme-leap-day
title: "The title of your site"
description: "A short description of your site's purpose"
show_downloads: true

Ref: