Apple Motion 4 - Manual (Page 269)

However, If you apply the same filter directly to the group, all layers nested within that
group are affected by the filter, as if they were a single layer.
Filter applied to the enclosing group
Background of Your Project
Two parameters in the Project Properties dialog (choose Edit > Project Properties) affect
the background color of your project and how your composition will appear when it’s
exported out of Motion:
Background Color: A color well that defines the color that appears in the Canvas if no
other object obscures the background.
Note: If you intend to export your project with a premultiplied alpha channel, be aware
that Motion always renders against black.
Background: A pop-up menu that defines whether the background color is rendered as
part of the alpha channel. If set to Solid, the background color creates a solid alpha
channel. If set to Transparent, the background color does not render as part of the alpha
channel. In either case, the background color is visible in the Canvas.
Selecting Layers and Groups in the Layers Tab
In order to reorganize layers and groups in a project, you must first select which ones
you want to move. This section covers the many methods you can use to select layers in
the Layers tab.
To select a single layer or group
µ
Click a layer or group in the Layers tab.
Doing so deselects all other selected objects.
Note: Selecting a group does not also select the layers nested underneath it. However,
operations performed on a selected group also affect layers nested within it.
To select multiple contiguous layers or groups
Do one of the following:
µ
Shift-click any two layers in the Layers tab.
269 Chapter 6 Creating and Managing Projects