Step 1: Load the Theme Preview from Online Store –> Themes –> Theme Name –> Preview
You can skip this first step if you're working from a Live Theme.
Step 2: Click on whatever page you want to preview and append “?view=template_name” to the end of the URL.
Example: myshopifystore.com/pages/about?view=newabout
That will load my existing About page with the template “newabout”
Hope that helps!
