Apple Motion 5.1.1 - Manual (Page 179)

Chapter 6 Create and manage projects 179
Motion attempts to interpret the correct parameter settings for each source media item you add
to a project. However, additional manual adjustment is sometimes necessary. Because Motion is
a nondestructive application, changes made to these parameters are not applied to the source
media files on disk. Parameter changes affect how objects are drawn in Motion.
The following controls let you modify source media in the Media list. Modifying source media
modifies all layers in a project linked to that source media.
Note: The parameters described below do not apply to Photoshop files imported as
separate layers. PDF files with transparent backgrounds do not have the Alpha Type or Invert
Alpha parameters.
Parameters in the Inspector
•
Alpha Type: Use this pop-up menu to choose how Motion deals with alpha channels in the
media item. An alpha channel contains information about areas of transparency in the image
or movie. When you import an image file or QuickTime movie, its alpha channel is immediately
recognized by Motion. There are several different ways to embed alpha channel information
into files, which correspond to the options in this menu. Motion assigns an option based on
an analysis of the object when it is imported, but you can override the default if necessary, by
choosing any of the following:
67% resize factor