to set this to a lower number than
        // viewDistance in order to save resources.
        mobileViewDistance: 2,

        // The "normal" size of the presentation, aspect ratio will be preserved
        // when the presentation is scaled to fit different resolutions. Can be
        // specified using percentage units.
        width: 1600,

        height: 1200,

        // Factor of the display size that should remain empty around the content
        margin: 0.1,

        math: {
          mathjax: 'ht