Currently it's not possible to move around H9 control's GUI. It's stuck to the upper side of the screen.
In some workflows where H9s are controlled via computer, it might be really handy dragging the GUI around.
Hope it could be done
Well it's definitely possible. Maybe it's just the window is up above the screen.
I'm assuming you use a Mac. You can press and hold the "option/alt" key, and then drag the bottom left corner of H9 Control's window. Then you'll see the title bar and move it around.