[Gvsig_english] [gvSIG 1.9RC1] how to delete last point while drawing a polyline ?

[Kremer Pierre]

Hi,
    I begin with gvSIG, and I will use it to vectorize large rasters. 
But when I make a mistake, I have to continue until the end of the 
polyline, and then remember me where I have to edit the false points ...
    Does anyone know if there in an undo command to delete the last 
point while vectorizing ?

Best regards
    Pierre.