To reposition any of the layout Panels:
•Click on the Designer tab at the top of the Preview window. Alternatively you can use the keyboard shortcut by holding down the Alt key and pressing the D key.
•Click on the window you wish to move. You will notice that little circles appear at the corners.
•Click on the window again only this time hold down the left mouse key and drag the window to the desired position and release the left mouse button.
Click back on the Preview view to see the changes.