Request (idea) > sketch on GH canvas to rhino

since gh has a graphic tool to "hand draw and link to rhino i would like to know if there is a away to use the canvas ( as canvas) to draw.
the drawing will be directly linked (as long it is not baked it is still editable)
drawing with wacom could be interesting as a tool to create line and curves in the canvas and to rhino

sorry if its not so clear