Looking for the Control List Window of NetBeans GUI Builder

Th开发者_如何学Goere was a window listing all Swing controls at the left bottom of NetBeans window. I guess I closed it for some reason. And now I cannot find it anymore. Anyone knows what the name of that window is and how to open it?

The window is called the 'Inspector'. You can open it using the Navigating->Inspector item of the Window menu.