2019.x

Table Of Contents
Manipulating Advanced Keyframes
109
Adjusting Parameter Values with the Bézier Interpolation Option
You can adjust Bézier curves in the following ways:
Symmetrically: Dragging a direction handle changes the length and rotation of both direction
handles symmetrically.
Before (left) and after (right) dragging symmetrically. Dragging the left handle up and to the left causes both sides to
rotate and increase in length.
Asymmetrically: Dragging a direction handle changes the length of the selected handle, but not
the opposite handle. The rotation of both handles changes as you drag the selected handle.
Before (left) and after (right) dragging asymmetrically. Dragging the left handle up and to the left causes the left side
to rotate and increase in length. The right side rotates but does not change in length.
Independently: Dragging a direction handle changes both the length and rotation of the selected
handle. The opposite handle does not change. You do this by “breaking” the handle.
Before (left) and after (right) dragging independently. The image in the center shows dragging with no rotation —
dragging the left handle to the left causes only the left side to increase in length. The image on the right shows
dragging and rotating — dragging the left handle up and to the left causes only the left side to rotate and increase in
length. In both cases, the right side of the curve does not change.
The default adjustment method is symmetrical. You change the adjustment method using the Alt key
(Windows) or Option key (Macintosh).
To use the Bézier interpolation option for adjusting a parameter value:
1. Select the Bézier interpolation option.
For more information, see “Controlling Parameter Changes at Keyframes” on page 106.
2. Click a keyframe indicator to activate it.
The keyframe indicator changes to pink, and a direction bar with direction handles appears.
3. Position the pointer over one of the direction handles.
The pointer changes to a hand pointer.
4. Do one of the following:
t Drag the mouse to move the direction handle.