My problem is converting a path into a bezier, and a bezier back to a Grease Pencil again (or path to Grease Pencil), since I need the handle assistance in Edit mode for those to get my shapes just right, and free handing with Grease Pencil isn't accurate enough for curves to start.
From there, my second problem is turning at least 2 Grease Pencil Lines into the opposite edges of a corelative surface, using BSurfaces. I can't get Bsurfaces to run.
What state do 2 opposite beziers need to be in? Do you have to start from grease pencil only?
How do I get Bsurfaces to show me the Add Surface button, to draw it's extrapolation for me?
I've found the buttons, keys and mouse click too confusing here.