Use Insert Keys to refine an animation by placing additional keys wherever you like. When Insert Keys is active, you can click anywhere on a function curve (Curve Editor) or in an animation track (Dope Sheet) to insert a key at that location. Insert Keys stays active until you activate a different mode.
If you insert a key in a component of a multi-part controller, vertices are inserted to each curve at the time location where you clicked. For example, inserting a key in the red X curve of a TCB Position track simultaneously inserts keys in the green Y curve and the blue Z curve.
The value of each inserted key is set by one of the following conditions:
To insert keys in a function curve:
If the highlighted curve is part of a multicurve controller, vertices are inserted into each curve at the time location where you clicked. For example, if you are using a Bezier Position controller, inserting a key into the red X curve of a Position track simultaneously inserts keys into the green Y curve and the blue Z curve.
To insert keys in Dope Sheet mode:
The horizontal position where you click sets the time of the key as measured on the time ruler.
The value of the new key is set by one of the following conditions:
If you are unable to insert a key into a track, make sure its controller uses keys. Not all controllers use keys; for example, procedural controllers such as Noise do not.