On the theme information page (where you go to install

On the theme information page (where you go to install the themes) one of the demo pictures shows a screenshot of the themes member page (image 4 of 7). in the screenshot there is an extra tab in between profile and messages called "sites' It shows the user has accessed 2 sites. I want that on my system so my users can easily get back to the subsites they are part of. How do I get it?