Apple Motion 4 - Manual (Page 237)

The image looks identical to an image that is scaled on import. However, its resolution
has been changed so that the image fits the Canvas. To observe that the resolution of
the image has changed, select the image file in the Media tab of the Project pane, and
then open the Media tab in the Inspector. The Fixed Width and Fixed Height parameters
display the new resolution of the imported image.
Note: You can use the Fixed Width and Fixed Height parameters in the Media tab to
further down-res the image.
Still Image Duration
When you first import a still image into your project, the image assumes a duration equal
to the current duration of your project. Increasing the duration of your project does not
automatically increase the duration of an image that’s already been imported. Still images
have infinite duration in Motion, so you can stretch them out in the Timeline to be as
long as you need. For more information about working with objects in the Timeline, see
Using the Timeline .
237 Chapter 6 Creating and Managing Projects