Can I manually add a trajectory keyframe (Reframing)?

The timeline Reframing tab allows you to interact with keyframes and control the framing of your clip precisely.

Once in Reframing mode:

Create a new user keyframe by double-clicking on the timeline
Delete a keyframe by double-clicking on it
Copy a keyframe by right-clicking on it ➞ Copy reframing keyframe
Paste a keyframe by right-clicking on the timeline ➞ Paste reframing keyframe
Reset all the user keyframes by right-clicking on the timeline ➞ Reset reframing keyframes
Control the pitch and yaw by left-clicking inside the frame (the frame will be re-centered on the click position)
Control the roll by placing the mouse cursor in the frame and scrolling the mouse wheel