Toggling Point Types
                                                        You can convert a control point into a keyframe and a keyframe into a control point. The position and other values will remain in both cases, only the frame will change. A control point is not locked in time.
- In the Camera view, use the Transform 
tool select a point to convert.
 
- To convert the point:
 
- From the top menu, select Animation > Lock in Time.
 - In the Function view or Function Editor, select the keyframe to convert and click the Lock in Time
 button.
- Press Alt + L.