Instructions
Locate the trim adjustment slider on the transmitter. It is normally above the steering joystick, running horizontally.
Raise the throttle enough to get the helicopter airborne, then observe the direction in which it rotates.
Slide the trim opposite to the rotation; in other words, if the helicopter spins clockwise, move the trim adjuster to the left until it no longer rotates uncontrollably. Make all adjustments gradually to prevent overshooting your mark.