Adobe 65021048 User Guide - Page 302

ADOBE PREMIERE PRO CS3 296 User Guide Fine-tune the speed of an effect In the Effect Controls panel, you can use the Velocity graph to adjust motion or the rate of change for a value just before and just after a keyframe. Such adjustments can simulate real-world motion. For example, you can change the motion of a clip so that it slows down just before a keyframe and then speeds up just after the keyframe. You can control the values approaching and leaving a keyframe together, or you can control each value separately. A BC Velocity graph A. Speed controls B. Incoming direction handles C. Outgoing direction handles 1 In the Effect Controls panel, click the triangle to expand the effect property with keyframes that you want to adjust. Note: If no keyframes have been added, the graphs appear as flat lines. 2 In the Value graph, use the Selection or Pen tool to click the keyframe marker for the keyframe you want to adjust. This displays the direction handles and speed controls for the keyframe in the Velocity graph. 3 In the Velocity graph, use the Selection or Pen tool to do one of the following: • To accelerate entering and leaving the keyframe, drag a direction handle up. Both the incoming and outgoing handles move together. • To decelerate entering and leaving the keyframe, drag a direction handle down. Both the incoming and outgoing handles move together. • To accelerate or decelerate entering the keyframe only, Ctrl-click (Windows) or Command-click (Mac OS) the incoming direction handle and drag it up or down. • To accelerate or decelerate leaving the keyframe only, Ctrl-click (Windows) or Command-click (Mac OS) the outgoing direction handle and drag it up or down. Note: To rejoin the incoming and outgoing handles, Ctrl-click (Windows) or Command-click (Mac OS) them again. • To increase or decrease the influence of a keyframe value on the previous keyframe, drag the incoming direction handle to the left or right. • To increase or decrease the influence of a keyframe value on the next keyframe, drag the outgoing direction handle to the right or left. Note: Influence determines how quickly the Velocity graph reaches the value you set at the keyframe, giving you an additional degree of control over the shape of the graph. The values (to the left of the Velocity graph) change as you adjust the graph. These numbers represent the upper and lower values of the Velocity graph. You can also adjust the velocity by changing the numeric values. See also "Edit keyframe graphs" on page 289 April 1, 2008