Apple Final Cut Pro 7 - Manual (Page 1122)

To resize one side of a Bezier handle independently of the other
µ
Hold down the Shift key as you drag a Bezier handle. Release the Shift key to lock the
relative length of the two handles back together using the new unequal lengths you set.
Press Shift, then drag to
resize one side differently
than another.
To change the angle between one side of a Bezier handle and the other
µ
Hold down the Command key as you drag a Bezier handle. Release the Command key to
lock the new relative angle of the two handles back together.
Press Command, then
drag to change the
angle between one side
of a Bezier curve and
the other.
To change the length and angle of one side of a Bezier handle independently of the
other
µ
Hold down the Command and Shift keys as you drag a Bezier handle.
Press Command and
Shift, then drag to resize
and change the angle
of one side only.
1122 Chapter 67 Adjusting Parameters for Keyframed Effects