Changing keyframe interpolation

Keyframe interpolation determines how values change from one keyframe to the next. You can apply one or more interpolation methods to any keyframe for most object properties. Some interpolation methods create abrupt changes or sharp angles in motion, while others provide a smooth transition and rounded curves. For example, by applying different interpolation settings to position keyframes, you can make an object decelerate as it drifts from the first keyframe to the second, and then make it quickly bounce off a third keyframe as it rounds a curve and speeds toward the final keyframe.

To change the interpolation of a keyframe:

1. In the Timeline window, select one or more keyframes for a single object property.
2. From the Timeline menu, choose one or more interpolation methods:
• Linear to change property values equally from one keyframe to the next. Linear keyframes create angled turns for position-based transformations, and sharp transitions for time-based transformations. For example, you can use this to show a ball bouncing off a wall.
• Auto Bezier (the default) to adjust property values to create curved motion or smooth transition from one keyframe to the next. This is useful for animating smooth movements, such as objects following a path.
• Hold Keyframe to create an abrupt change from one keyframe to the next. With Hold Keyframe, there is no interpolation. For position-based transformations, the object holds its current position or property setting until it jumps to its new settings when the current-time marker reaches the next keyframe. For other transformations, the object property abruptly switches from one setting to the next at the next keyframe.
• Ease In to slow the transition rate approaching the keyframe. For example, you can use this to animate a car decelerating to a stop.
• Ease Out to slow the transition rate leaving the keyframe and gradually increase the transition rate. For example, you can use this to animate a car gradually speeding up.