Heads up! This blog post hasn't been updated in over 2 years. CodePen is an ever changing place, so if this post references features, you're probably better off checking the docs. Get in touch with support if you have further questions.
When you view your own Public, Private, Popular, or Forked Pens on your profile, you have the choice between the normal “grid view” and a “list view”. You toggle between then with the buttons provided. List view looks like this:
Some people have reached out to say that they prefer this view when looking at their own Pens, since they can see more Pens more quickly and are often looking for something specific by name.
Just as a little bonus for them (and everybody, really), your profile now remembers the last view you had it in, and when you go back to those pages (e.g. your public Pens) it will be in that view.