Double clicking on the PythonActor brings up the
usual Edit Parameters dialog which displays the
name of the jython class and the scale parameter.
To edit the script, right click on the PythonActor
and select "Look Inside". Note that if you make
changes to the script, be sure to save the top-level
model.
Compare this with the PythonScript actor, which
if you double click on it, then the Python script
is displayed.