Apple Final Cut Pro 7 - Manual (Page 919)

2 Move the Pen tool to the point in your sequence where you want to set a keyframe, then
click the overlay to set the keyframe.
The keyframe appears as
a small diamond at the
point where you clicked.
To adjust keyframes in the Timeline
µ
Place the Selection tool directly over a keyframe, so that it turns into a crosshair pointer.
You can now adjust a single keyframe by dragging it up or down to change its level, or
from side to side to move it forward and backward in time.
919 Chapter 57 Mixing Audio in the Timeline and Viewer