On the theme, there is a blog with the name: Portfolio
If you want to show as it, do as these steps.
Step 1: Create a new blog with the name: Portfolio
+ Go to Blog post -> Manage blogs
Step 2: Create the new blog post which into “Portfolio” blog
+ Go to Blog post -> Add Blog post
+ Choose the blog is “Portfolio” and add the tags for it
Step 3: Style for the blog:
+ Go to Theme settings -> Portfolio Pages
+ Then, style for it
Thank for reading!