Actually, credits are displayed if you are using final version (6.0.0 or later) and "Default V6" theme. The credits are shown below the track listings. And there is also Line-up section right below the artwork, listing musicians that perfomed on the album.

If you don't see it, it could be because you had v6 beta previously installed and then upgraded to final build. In this case theme file may be not overwritten.

The solution would be to delete or rename Default V6.dax and then reinstall the software.

Andrei