changing arc of graphical arrow

If a graphical arrow starts at an atom and ends in empty space, it is not possible to change the arc of the arrow.  When I click and hold on the center of the arrow and move the mouse, it's as if I have clicked and held on the arrow endpoint (the one not connected to the atom).  

Dear Bob!

   Please help me with the correct workflow, because I could not reproduce your problem:

1. I have placed an atom (an Oxygen) to the canvas


2. I have selected the curved arrow from graphical button group


3. I hav drawn a curved arrow from the atom and placed it in the open space of the canvas


4. I have changed to selection tool


5. I have clicled to the middle point of the arrow, and drag the mouse

   It has changed the arc angle in my computer. What version of Marvin Sketch do you use?

Regards:
Balázs 

Ah!  I was using a graphical straight arrow.  When you anchor both ends of the graphical straight arrow to atoms, you can change the arrow from straight to curved.  When you anchor only one end of the arrow to an atom, then you can't change the arrow from straight to curved.  But I didn't realize you had added a graphical curved arrow (different from the electron-flow arrow), and yes, you can change its arc as you describe, so I can use the graphical curved arrow to draw fake electron-flow arrows.

I am happy to help. :)