ent slider to have a value greater than
            the value of the Slider *slidermax*.

        dragging : bool, default: True
            If True the slider can be dragged by the mouse.

        valstep : float or array-like, default: None
            If a float, the slider will snap to multiples of *valstep*.
            If an array the slider will snap to the values in the array.

        orientation : {'horizontal', 'vertical'}, default: 'horizontal'
            The orientation of the slider.

        initcolor : color, default: 'r'
            The color of the line at the *valinit* position. Set to ``'none'``
            for no line.

        track_color : color, default: 'lightgrey'
            The color of the background track. The track is accessible for
            further styling via the *track* attribute.

        handle_style : dict
            Properties of the slider handle. Default values are

            ========= ===== ======= ========================================
            Key       Value Default Description
            ========= ===== ======= ========================================
            facecolor color 'white' The facecolor of the slider handle.
            edgecolor color '.75'   The edgecolor of the slider handle.
            size      int   10      The size of the slider handle in points.
            ========= ===== ======= ========================================

            Other values will be transformed as marker{foo} and passed to the
            `~.Line2D` constructor. e.g. ``handle_style = {'style'='x'}`` will
            result in ``markerstyle = 'x'``.

        Notes
        -----
        Additional kwargs are passed on to ``self.poly`` which is the
        `~matplotlib.patches.Polygon` that draws the slider knob.  See the
        `.Polygon` documentation for valid property names (``facecolor``,
        ``edgecolor``, ``alpha``, etc.).
        Nr