The portfolio is powered by the Genesis Portfolio Pro plugin. This plugin will automatically install when you run the Required Plugin installation.
Create a new page. Navigate to Pages > Add New > name it portfolio and save.
If you would like your main portfolio page to have a large banner image behind the title you will navigate to Appearance > Customize > Portfolio page and set an image there.
Now you will navigate to Portfolio Items > Add New
You can add any information you want to your portfolio entry. If you would like a large banner image at the top of the page behind the title you simply set a featured image for this portfolio entry.
If you would like to add the buttons to navigate back to the main portfolio page and on to your services page you can navigate to Appearance > Widgets > Single Portfolio Page Widget
This widget area displays at the bottom of the single portfolio pages. It was designed to allow you to direct visitors back to the full portfolio page or on to your services page. You could use it however you choose.
Here is the code we used to add the two buttons you see in our demo: