The URL doesn't change when I click on the About link. I can replace index.html with about.html in browser and it works

You may have missed a step if you have already gone to the end of the course. What I see in the snapshot is this:

         <li><a href="index.html" class="selected">Portfolio</a></li>
         <li><a href="index.html">About</a></li>
         <li><a href="index.html">Contact</a></li>

All of these links reference the same thing (the portfolio page). I believe this is how the workspace starts out when you first launch it. But here's what I would expect to see in finished code:

         <li><a href="index.html" class="selected">Portfolio</a></li>
         <li><a href="about.html">About</a></li>
         <li><a href="contact.html">Contact</a></li>

Notice that each link has a different "href" attribute value now.

Thank you, Steven, I copied what you have here and it still doesn't switch over when I click on the about link. But I can type in about and it takes me to the about page.

I'm trying to work forward now and got a code challenge and the challenge is about “Add the profile picture "img/gratt.png" inside the section element. Then, write a description in the alternate attribute and add the class "profile-photo" to the image.” Which the last video I watched didn’t mention anything a gratt.png. I think it skipped that video.