/* sets canvas show mode for panels */
_scshow(mode)
{
        /* normal show and use last size */
        if (mode == 4)
        {
                setconfig("CANVAS_SHOW",     1);
                setconfig("CANVAS_AUTOSIZE", 0);
        }
        else
        {
                setconfig("CANVAS_SHOW",     mode);
                setconfig("CANVAS_AUTOSIZE", 1);
        }
}