You
            can change the position of a keyframe or tangent handle on an animation
            curve.
         
         If you move a keyframe,
            the frame number (horizontal) and keyframe value (vertical) coordinates
            of the keyframe are updated and displayed. The shape of the curve
            is updated automatically.
         
         If you move a tangent
            handle, the value of the slope is updated and displayed. After a
            tangent handle is moved, it appears as a solid square.
         
         While moving a keyframe
            in the Animation Curve window, press Alt to
            snap the frame value (vertical axis) to the nearest integer. Press Ctrl+Alt to snap to the nearest
            multiple of ten.
         
         To move a keyframe or tangent handle:
         
         
            - Access the Animation Curve window or
               the Track Editor. To both move keyframes on the Y-axis and adjust
               tangent handles, you must use the Animation Curve window.
            
- From the Edit Mode box, select Move (or
               press M).
            
- Select and drag the keyframe or tangent
               handle that you want to move to a new position. You may have to
               click the Frame Chn button to view the curve.
               TipWhen you move keyframes
                     in the Animation Curve window, you may want to move the keyframe
                     strictly on the X-axis or strictly on the Y-axis. To lock keyframe
                     movement to the X- or Y-axis, hold Shift as
                     you move the keyframe. The keyframe movement will be locked to the
                     X-axis if your initial movement is horizontal and to the Y-axis
                     if your initial movement is vertical.