Adobe AFTER EFFECTS 5.5 Help Manual page 65

Adobe After Effects Help
Using Help | Contents
To set the background color of a composition:
1 Choose Composition > Background Color.
2 Click the color swatch to select a color, or click the eyedropper to sample a color from
anywhere on the screen. Then click OK.
To set the pasteboard color of a composition:
1 Choose Edit > Preferences > Display.
2 Click the color swatch to select a color, or click the eyedropper to sample a color from
anywhere on the screen. Then click OK.
Using checkerboard backgrounds to display transparency
You can toggle a checkerboard pattern on or off (like the checkerboard that Adobe
Photoshop uses to indicate transparency). Viewing the checkerboard pattern may slow
down window redraw.
To turn on or off the checkerboard background:
Choose Checkerboard Backgrounds from the Composition window menu.
Changing the region of interest
Use the Region of Interest button to create a rectangular preview of the composition
window. Reducing the region of interest requires less memory when previewing, thereby
improving interaction speed and increasing RAM preview duration. Changing the region
of interest does not affect file output.
To change the region of interest:
1 In the Composition window, do any of the following:
To draw a region of interest, click the Region of Interest button ( ), and then drag the
•
marquee tool across the area of the composition window where you want images to
appear.
To toggle between viewing the region of interest and the full composition area, click
•
the Region of Interest button again.
To start over with the marquee tool, hold down Alt (Windows) or Option (Mac OS) and
•
click the Region of Interest button.
Using the Timeline window
Use the Timeline window to set up changes over time, animate layer properties numeri-
cally, and set In and Out points for a layer. The Timeline window controls are organized in
panels of related functions.
Using Help | Contents
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Building a Composition
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