More features while extruding curves in Grease Pencil

When i'm inking a sketch with the curve tool whith the "E" key I can't move or zoom in or out in the viewport. If the reference drawing is too big i can't continue lines longer than what fits on the screen. It would be great that the curve tool does not block the viewport panning and zooming. It would also be good that the controllers of the curve, the light blue ones, do not appear in the same place so it is easier to know which corresponds to each extreme of the curve.