It’s easy to set a bed with an adjustable base to zero gravity, even if it does not have a zero-gravity preset. To start, elevate your chest and legs at the proper angles. You can do this by either using your bed’s Zero-G preset button, or by elevating both your chest and legs at a 120-degree position. Find the position that works best for you, and if possible, save it so you can go back zero-gravity whenever you desire.