Somebody told me how to do this once before. Dang if i can remember or find it. The three pane sub window on my forte agent has slid up so i no longer see the top of the window.
In windows terms this is called a child window of agent. There is a keyboard shortcut to get this window's focus. You can then press the "M" key and arrow to move the window. Its exactly like moving a main window by press alt-space, then M, then the arrow keys.
I've been trying all the keyboard combos i can think of - no joy.
Karl