How do I setup a Portfolio Page?
1. Add a few blog posts, each with a Featured image and at least one category assigned to it.
2. Create a new Page, give it a title (presumably “Portfolio”).
3. Select one of the Portfolio templates from the right sidebar of the page editor.
4. Select a few categories (under Page Options) that you’d like to use on that portfolio. Those will become the filters buttons as well.
5. Hit Publish.
6. Visit the Appearance > Menus page and add the new portfolio page to your menu.