A true gimbal will return to the horizontal plane when released. To elevate the lens, which JC asked about, you either have to lock down the tension screws, or shift the balance of the camera.
If your Gimbal returns your camera to level when released then your center of gravity is too low and out of balance. That is a trait of the Manfrotto design that cannot be overcome. A true Gimbal, of the Wimberly, Jobo, Desmond, or even Beike designs will allow your camera to hold itself in any position without adding tension to do so.