One of the most commonly-used features of the HoverflyGIMBAL is the Mode Switch setting. While the HoverflyGIMBAL alone will provide auto-compensation to all three axes, assigning a Mode Switch will give you direct control over the gimbal and allow you to switch between different control schemes.
HoverflyGIMBAL users should be aware of how the Mode Switch will affect their gimbal. This is what you should expect to see from your gimbal in each Mode Switch position:
Mode 0 (Landing): Only the Yaw servo will have stick control. Roll servo should auto-compensate only. Tilt servo should auto-compensate only. Yaw servo should NOT auto-compensate. (This mode should always be used when landing and before taking off, as it can prevent some serious mishaps from occurring with the Yaw axis - this is also why you can not change the Yaw servo away from Mode Switch.)
Mode 1 (Position): All servos should auto-compensate. Stick control will result in the servo moving along with the stick; if the stick returns to center, so will the servo.
Mode 2 (Velocity): All servos should auto-compensate. Stick control will result in the servo moving at a speed governed by the stick; if the stick returns to center, the servo will stop wherever it is.