To adjust the Opacity effect in the Timeline window:

1. Click the triangle next to the video track name to expand it.
2. Click the Show Keyframes button , and choose Show Opacity Handles from the menu that appears.
3. In the timeline, drag the opacity handle up or down. The opacity value and current time appear as a tool tip as you drag.

   To set the opacity values to change over time, add keyframes in the Timeline window

Adding Keyframes:

You can add keyframes to the Timeline window at the current time using the Add Keyframe button, or at any time using the pen tool. Before adding keyframes, keyframe display must be enabled for the track or clip you want to edit; see Displaying keyframes in the Timeline window.

To add a keyframe using the Add Keyframe button:

In the keyframe navigator in the Timeline window, click the Add Keyframe button.

To add a keyframe using the pen tool:

1. Position the pen tool over the gray keyframe graph line in the track where you want to add a keyframe. If no keyframes exist, the graph is a straight horizontal line across the track.
2. Ctrl-click the keyframe graph. When you position the pen tool over a keyframe graph and press Ctrl, a plus sign (+) appears next to the pointer.

Displaying keyframes in the Timeline window

By default, keyframes in the Timeline window are hidden. For video and audio effects, the Timeline window can display the keyframes specific to each clip. For audio effects, the Timeline window can also display the keyframes for an entire track. Each clip or track can display a different property. However, within an individual clip or track, only one property's keyframes can be displayed at a time. You can specify which property's keyframes are currently displayed by using an effect properties pop-up menu available on every clip or audio track in the Timeline window. This menu contains only the effects already applied to that clip or track (see Applying and controlling Standard effects).

The segments connecting keyframes form a graph that indicates changes in keyframe values along the duration of the clip or track. Adjusting keyframes and segments changes the shape of the graph.


Track keyframe controls in the Timeline window A. Disclosure triangle B. Show Keyframes (video) C. Show Keyframes (audio) D. Previous Keyframe button E. Add Keyframe button F. Next Keyframe button G. Track effect properties H. Keyframe graph I. Track keyframes J. Clip keyframes K. Clip effect properties

To enable keyframe display in the Timeline window:

1. If the track is collapsed, click the triangle to the left of the track name to expand it.
2. Click the track's Show Keyframes icon, and select a keyframe display mode.

To display clip opacity keyframes:

Click the track's Show Keyframes button , and choose Show Opacity Handles from the menu that appears.

To display audio volume keyframes:

Click the track's Show Keyframes button, and choose Show Clip Volume or Show Track Volume from the menu that appears.

To display keyframes for a specific effect property other than opacity or volume:

In the effect properties pop-up menu that appears after the name of the clip or track, select the property you want to adjust. If you can't see the pop-up menu, try increasing the magnification of the Timeline window.

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