I've press MENU, but all I see is a horizontal band.

Gateway FAQs
Once you’ve pressed the MENU button to bring up the main menu, the top level of choices will appear in a horizontal band; use the left and right arrow buttons to browse through your choices. There are a couple of features to be aware of with the horizontal categories:

  1. Auto Expand
    When you bring a horizontal card into focus, all of the choices in that category will open up in a vertical list.
  2. Navigation Fade Back
    When a vertical list appears, the horizontal navigation fades. Simply pressing the left or right arrow buttons will bring the horizontal menu right back.