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        X11(display = "", width = 7, height = 7, pointsize = 12,
            gamma = 1, colortype = options()$X11colortype,
            maxcubesize = 256)

   AArrgguummeennttss::

    display: the display on which the graphics window will
             appear.  The default is to use the value in the
             user's environment variable `DISPLAY'.

      width: the width of the plotting window in inches.

     height: the height of the plotting window in inches.

   pointsize: the default pointsize to be used.

      gamma: the gamma correction factor.  This value is used
             to ensure that the colors displayed are linearly
             related to RGB values.  A value of around 0.5 is
             appropriate for many PC displays.  A value of 1.0
             (no correction) is usually appropriate for high-
             end displays or Macintoshs.

   colortype: the kind of color model to be used.  The possi-
             bilities are `"mono"', `"gray"', `"pseudo"',
             `"pseudo.cube"' and `"true"'.

   maxcubesize: can be used to limited the size of color cube
             allocated for pseudocolor devices.

   DDeessccrriippttiioonn::

        `X11' starts a graphics device driver for the X Window
        System (version 11).  This can only be done on machines
        that run X.  `x11' is recognized as a synonym for
        `X11'.

        By default, an X11 device will use the best color ren-
        dering strategy that it can.  The choice can be overri-
        den with the `colortype' parameter.  A value of
        `"mono"' results in black and white graphics, `"gray"'
        in grayscale and `"true"' in truecolor graphics (if
        this is possible).  The values `"pseudo"' and
        `"pseudo.cube"' provide color strategies for pseudo-
        color displays.  The first strategy provides on-demand
        color allocation which produces exact colors until the
        color resources of the display are exhausted.  The sec-
        ond causes a standard color cube to be set up, and
        requested colors are approximated by the closest value
        in the cube.  The default strategy for pseudocolor dis-
        plays is `"pseudo"'.

   SSeeee AAllssoo::

        `postscript', `macintosh', `Devices'.

