[Inkscape-user] verb DialogLivePathEffect: how to use it ?

Hello,

I would like to understand how to apply a hatch effect on an object.

I saw the "DialogLivePathEffect: Manage, edit, and apply path effects (Shift+Ctrl+7)" option, but I would like to know how to set it right.

--select=myobject --verb DialogLivePathEffect

but then, nothing. How does that work ? I would like to edit the different values inside as well..

Thanks !