About Preview Modes; To Use Opengl For Previews; To Preview Audio And Rendered Images; To Preview Composition Audio - Adobe AFTER EFFECTS 7.0 Manual

Note: To preview audio in the work area, select the layer and press Alt+period (Windows) or Option+period (Mac OS).

To preview audio and rendered images

1 If the Time Controls panel is not open, choose Window > Time Controls. Select RAM Preview Options, and then
do one of the following:
•
If From Current Time is selected, move the current-time indicator in the Timeline panel to the time at which you
want the preview to begin.
•
If From Current Time is not selected, set the work area for the area you want to preview.
2 Click the Audio button
If needed, click the Loop button repeatedly to select the preview direction you want: looping from start to
3
finish , single play (forward)
4 Click the RAM Preview button
See also
"To set a work area" on page 121
"To preview a composition using RAM Preview" on page 135

To preview composition audio

You can preview (scrub) audio by dragging the time marker in a composition. Use this technique to easily identify
and mark a location to synchronize audio and visual effects. Instead of using the audio waveform, you can identify
a location in the layer by moving the current-time indicator in the Timeline panel and listening to audio playback.
❖
In the Timeline panel, hold down Ctrl (Windows) or Command (Mac OS) while you move the current-time
indicator.
As you drag across time, After Effects plays segments of the audio. You can play the audio forward or backward. If
you stop moving the current-time indicator while keeping the mouse button depressed, a short section of audio will
loop.
Preview modes

About preview modes

The preview modes provide different balances between quality and speed. All of the preview modes are available for
standard, manual, or RAM previews, and are accessed by clicking the Fast Previews button
panel, by selecting menu options, or by clicking the various playback mode buttons in the Timeline.

To use OpenGL for previews

OpenGL is a set of standards for delivering high-performance 2D and 3D graphics for a wide variety of applications.
For After Effects users, OpenGL provides high-quality previews that require less rendering time than other playback
modes. OpenGL can also be used to speed up final render times for your project.
OpenGL provides fast screen previewing of a composition without degrading resolution. This makes OpenGL the
most desirable preview option for most situations.
.
, or cycling forward and backward
or press 0 on the numeric keypad.
ADOBE AFTER EFFECTS 7.0
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in the Composition
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User Guide