Graph subwindow in a Panel

I have a Graph subwindow embedded in a Panel. I want to use the Draw tools in the Graph, but can't seem to activate them. (The Tools for the Panel are not activated.)

When I execute
ShowTools /W=Panel0#G0/A

I get a ShowToolsError window that indicates the syntax is not recognized (Expected "normal", "line",..etc)

Any suggestions would be appreciated. Using IP 6.31, Win7.
Thanks, John. That should have been obvious to me from the documentation on sub-graphs in Graph windows.