How to use the vedo.Text2D function in vedo

def add_text(
        self, text, pos=8, size=1.75, color="k", alpha=1, font="Montserrat"
    ):
        """
            Adds a 2D text to the scene. Default params are to crate a large black
            text at the top of the rendering window.

            :param text: str with text to write
            :param kwargs: keyword arguments accepted by vedo.shapes.Text2D
        """

        txt = self.add_actor(
            Text2D(text, pos=pos, s=size, c=color, alpha=alpha, font=font)
        )
        return txt