User`s guide

Chapter 5 Animation
218
the image globally, you might set the Default Interpolation menu to Constant. However, you
can always use another interpolation type by pressing the interpolation field and choosing
the appropriate interpolation type from the menu that appears.
The
Toggle Interpolation menu lets you set an alternative interpolation type. You can toggle
from the default interpolation to the toggle interpolation by
Alt-clicking a parameter’s
interpolation field. This allows you to quickly access another frequently used interpolation
type in addition to the default setting.
The
Keep Keyframe Time checkbox preserves the absolute positioning of keyframes when
the duration of the effect is changed. Deselecting this option preserves the relative
positioning of keyframes when the duration is changed.
For example, if you create an animated effect that is three seconds long, then change the
effect duration to five seconds with Keep Keyframe Time selected, the keyframes retain their
original positions with respect to the effect timecode.
If you change the duration of the same effect with Keep Keyframe Time deselected, the
keyframes shift to reflect the effect’s new duration. For example, in an effect lasting two
seconds, with a keyframe positioned one second from the start (at Time 00:00:01:00), the
keyframe will shift to two seconds (Time 00:00:02:00) when the effect duration is increased
to four seconds.
To set a default interpolation type:
1. Select Window > Show Keyframe Palette.
2. Select the Default Interpolation from the menu.
When you adjust a parameter, the default interpolation appears in the interpolation field.
1. Select the Toggle Interpolation type from the menu.
2. Alt+click the interpolation field, to switch between the default and toggle interpolation
types.
You can also use the Animate button to switch between the Constant and default
interpolation.
For more information on the various interpolation types, see “Working with
Interpolation Types” on page 224.
3. Expand the Position Y track to view or adjust the Bézier handles.