uld show a help overlay when the questionmark
        // key is pressed
        help: true,

        // Flags if it should be possible to pause the presentation (blackout)
        pause: true,

        // Flags if speaker notes should be visible to all viewers
        showNotes: false,

        // Global override for autoplaying embedded media (null/true/false)
        autoPlayMedia: null,

        // Global override for preloading lazy-loaded iframes (null/true/false)
        preloadIframes: null,

       