Apple Final Cut Express 4 - Manual (Page 61)

Chapter 4 Overview of the Final Cut Express Interface 61
II
To make a tab appear in its own window:
m Drag the tab out of its parent window (Browser, Viewer, Canvas, or Timeline).
To put a tab back in its original window:
m Drag the tab to the title bar of its parent window.
The Effects tab is dragged
out of the Browser and
appears in its own window.
Drag the tab
to the title bar of the
original window
to put it back.