Apple Motion 2 - Manual (Page 200)

200 Chapter 2 Creating and Managing Projects
Note: If you intend to export your project with a premultiplied alpha channel, be aware
that most alpha channels are rendered against either white or black.
Background Opacity: A slider that adjusts the opacity of the background. Setting this
value to 100 percent makes the background completely solid—no transparency
appears in the resulting image when it is exported. Setting this value to 0 renders the
background completely transparent when the project is exported with an alpha
channel.
Selecting Objects and Layers in the Layers Tab
In order to reorganize objects and layers in a project, you must first select which ones
you want to move. This section covers the many methods you can use to select objects
in the Layers tab.
To select a single object or layer:
m Click an object in the Layers tab.
This deselects all other selected objects.
Note: Selecting a layer does not also select the objects nested underneath it. However,
operations performed on a selected layer also affect objects nested within it.
To select multiple contiguous objects or layers, do one of the following:
m Shift-click any two objects in the Layers list.
This selects both objects, and also all objects in between.
m Click to the left of any object’s thumbnail icon and drag up or down to select multiple
objects.
To select or deselect multiple noncontiguous objects or layers, do one of the
following:
m Command-click any unselected object to add it to the selection.
m Command-click any selected object to deselect it.
To select all objects or layers in the Layers tab, do one of the following:
m Choose Edit > Select All (or press Command+A).
m Click the first object in the list, then Shift-click the last object in the list.
To deselect all objects or layers in the Layers tab:
m Choose Edit > Deselect All (or press Shift+Command+A).
Reorganizing Objects in the Layers Tab
The order in which objects and layers appear in the Layers tab helps to determine the
layout of your entire project. The order of objects and layers determines which objects
appear to be in front, and which are in back. You can change the ordering of one or
more objects in the Canvas, or you can change the ordering of nested groups of
objects or layers in the Layers tab.
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