What does my content have letterboxing (black bars) on the sides?

Make sure that your content is designed in the same resolution as your display. For instance, most displays these days are 1920 pixels wide x 1080 pixels tall (1080HD). This is also the maximum resolution of the XOGO Mini 2. If your content is designed in the same resolution as your screen, it will appear full-screen with no letterboxing on the sides.