is, an ordered collection of points). You must give a name to the piste. If it is an already existing piste, the new points are added to it. Points are always arranged in the order they got initialized in the tool, so if you want to define a specific order (this is very likely if the piste is going to be used as an argument for a projector call), just use the "display " button once to remove the points from the tool, then use it another time to display them again, and this time type their names in the order