Apple Logic Pro 9 - Manual (Page 88)

Understanding the Window Types
There are two different types of windows in Logic Pro: normal windows and floating
windows.
Working in Normal Windows
You can open as many normal windows as you like, including several of the same type.
Even though the contents of all windows are constantly updated, only one window is
ever the top, or active, window. This is the window that is in the foreground when several
normal windows overlap. It is referred to as having key focus.
Key focus windows can be recognized by a title bar that is illuminated (with the title bar
text in black) and a white focus frame around the window content.
88 Chapter 4 Customizing Your Window Setup