Apple Motion 4 - Manual (Page 253)

This operation allows you to use temporary layers in your project until the finished layer
is available. For example, if you’re expecting artwork from another artist that’s not yet
available, you can use a temporary graphic with the same dimensions, and then exchange
it when the final artwork becomes available.
This operation is extremely useful for customizing projects created using templates. For
more information, see
Customizing Projects Created with Templates .
To exchange a layer in your project in the Layers tab
1 Drag a file from the File Browser onto a layer in the Layers tab.
2 When a curved pointer appears, release the mouse button.
The original layer in the Layers tab is replaced by the new object.
The curved pointer appears when
you drag a new object over an
existing object’s thumbnail.
To replace a layer in the Media tab
1 Select the object you want to replace in the Media tab.
2 In the Inspector, open the Media tab.
3 Click Replace Media File.
A dialog appears.
4 Navigate to the file you want to use to replace the current source media.
5 Click Open.
The new media object replaces the current object in the Media tab along with all layers
or objects linked to the media object in your project.
Object Media Tab Parameters
When you select an object in the Media tab of the Project pane, the Inspector displays a
Media tab that contains the properties defining how the object appears in Motion. This
includes parameters such as the type of alpha channel used, pixel aspect ratio, field order,
and so on. All of these parameters can be edited, which changes the way that object is
displayed and composited in your project.
253 Chapter 6 Creating and Managing Projects