Apple Motion 4 - Manual (Page 539)

Ordinarily, when you make transformations to an object in the Canvas, the object remains
in the new position or shape for its entire duration. In order to create change in an object
over time, you must create keyframes. There are several ways to create keyframes while
working in the Canvas.
Using the Record Button
One of the simplest ways to create keyframes is to use the Record button. When Record
is enabled, a keyframe is created for any parameter that is adjusted.
Note: When Record is enabled, keyframes are created whether you adjust the object
onscreen, in the HUD, or in the Inspector.
Record button on Record button off
When keyframing (Record) is enabled, the changes that you apply to the object are applied
at the current playhead position (viewable in the mini-Timeline at the bottom of the
Canvas). A keyframe is automatically added (though no indicator appears). If you move
the playhead to a new position and change the shape or position of the object, you create
a new keyframe. Motion automatically figures out the shape and position of the object
during the frames between the two keyframes you set.
Important: When Record is enabled, a red keyframe appears in the center of the selected
object. When moving the object in the Canvas, do not click the keyframe in the center
of the object as you are actually selecting and repositioning that keyframe instead of the
object’s current position.
To scale an object over time using the Record button
1 Click the Record button (or press A) to turn on keyframe recording.
You can also choose Mark > Record Animation.
2 Select an object in the Canvas.
3 Move the playhead to a new time position.
4 Resize the object by dragging a scale handle.
5 Click the Record button (or press A again) to turn off keyframe recording.
The object is scaled over the interval you set. In this same way, you can keyframe any of
the transformation parameters for your object.
539 Chapter 10 Keyframes and Curves