Apple Final Cut Pro 7 - Manual (Page 977)

To move a keyframe forward or backward in time
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Move the pointer over the keyframe you want to move. When the pointer becomes a
crosshair pointer, drag the keyframe forward or backward along the keyframe graph line.
As you drag, a box displays the timecode duration of the change you’re making.
To delete a keyframe
Do one of the following:
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Control-click the keyframe you want to delete, then choose Clear from the shortcut menu.
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Move the pointer over the keyframe you want to delete. When the pointer becomes a
crosshair pointer, drag the keyframe up or down out of the keyframe graph area. When
the pointer turns into a small trash can, release the mouse button.
Trash can icon
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Move the playhead to the keyframe you want to delete, then click that parameter’s
keyframe button to remove the keyframe.
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Hold down the Option key and move the pointer over an existing keyframe. When the
pointer changes to the Delete Point tool, click an existing keyframe with the Delete Point
tool to delete that keyframe.
977 Chapter 59 Using Audio Filters