Adobe 25510629 - After Effects CS3 Professional, Руководство пользователя

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Creating and assigning sources and virtual sets 63
you don’t actually set up the whole session and render out the composited footage, you can at
least set the key in a minute or less to confirm that all will go smoothly during post-
production. To learn more about OnLocation, go to the Adobe website (
www.adobe.com ),
and download a free trial version.
Assigning content to layers
This section explains how to assign a source to a layer and addresses some of the fine points of
dealing with sources.
Assigning source content to a layer
Ultra provides several methods for assigning an image, video clip, or virtual set to the
appropriate layer. Most of these methods apply the selected source to the active layer. For
more information, see
“Active layer” on page 24 . If the correct layer isn’t selected, either click
its layer thumbnail or use the list under the Input Preview Monitor. For the inset and overlay
layers, you may also have to choose the desired layer (Source B, C, and so on; or Overlay 1, 2,
and so on) by using the list above the layer thumbnail. After the layer is selected, any of the
following actions assign a source to it. These methods also work for assigning a virtual set.
Double-click the source’s thumbnail image in a library tab. When you double-click the
thumbnail image for a still image or video clip on one of the tabs, that image or clip is
assigned as the source for the active layer. Double-clicking a virtual set, however, assigns it
to the Virtual Set layer, regardless of which layer you select.
Right-click the source’s thumbnail image in a library tab, and choose Open.
Drag the source’s thumbnail image from a library tab onto the Input Preview Monitor or
Output Preview Monitor.
You can assign a source to any layer, regardless of which one is active, by dragging and
dropping the source’s thumbnail image directly on the layer’s thumbnail. As with the previous
options, you may need to select the specific inset or overlay first. Assigning a source to a layer
by dragging the source to the layer thumbnail does not make that layer the active layer.