ADOBE AFTER EFFECTS 7.0
User Guide
115
Example of an image at composition resolution and half resolution
A. Original composition resolution B. Halfresolutionwithsameclaritybutwithreductioninscreensize C. Half resolution with same screen
size but with reduction in clarity
To determine appearance of lower-resolution compositions
When setting resolution, you can determine the size and appearance of the composition. When you lower the
resolution of a composition, you can maintain image clarity by reducing the composition’s size. You can also
maintain its size but reduce image clarity, with the layers appearing blockier and more pixelated. The smaller on-
screen image will update faster than the original-size image with a lower resolution.
1 Choose Edit > Preferences > Display (Windows) or After Effects > Preferences > Display (Mac OS).
2 Select Auto-Zoom When Resolution Changes to reduce the size of the composition while maintaining image
clarity. Deselect this option to maintain the composition size in the Composition panel but display layers with less
clarity.
3 Click OK.
You can also set the magnification using the menu in the Composition panel.
Setting start timecode or start frame
Use the Composition Settings dialog box to determine when the composition will begin. The name of the option in
the Composition Settings dialog box is determined by whether Timecode, Frames, or Feet + Frames is selected in
the Project Settings dialog box. For example, if Timecode Base is specified, you can use the Start Timecode option
to specify when the composition will begin; if Frames is selected, you can use the Start Frame option to specify the
frame number where the composition will begin.
See also
“About timecode and duration” on page 54
To set duration
The duration is the overall length of the composition.
❖ Set duration by typing values in the Duration box in the Composition Settings dialog box.
When you preview or render a movie, you can choose to preview or render only a portion of the total duration.
See also
“To set a work area” on page 121
A BC
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