The Windows->Reset All menu item resets the FS/2 window to the 'optimum' size and position for the screen size and resets all internal windows to their default size and position.
Mouse user tip: Push the Data Panel Size pushbutton to achieve the same result as the keyboard 'W' in all window sizing commands. For example, holding down the Ctrl+Alt keys and pushing Size will invoke the same command as a keyboard Ctrl+Alt+W.
Accelerator Keys - Ctrl Alt W