Helpfully, it includes help documentation about the desktop.
 

As with most Gnome 2 desktops, the control panel setting are available under the "System" menu.

Solaris 11 is a little picky about administrative stuff and permissions, obviously because it is more of a server os.

As is typical with Gnome 2 based desktops, it is completely configurable. You can add more panels, and place whatever launcher items or applets you want on it.

And, of course, it is completely themeable. But there are only a few themes and colors to choose from.

Anyway, shutting down Solaris 11.