By default, keyframe points on an animation path use Bezier curves. You can modify the curve angle by dragging tangent handles or by converting Bezier keyframe points to linear points.
In Motion, do any of the following:
Change the angle of a Bezier keyframe point: Click to select a Bezier keyframe point in the canvas, then drag its tangent handles.
Convert a smooth Bezier keyframe point to a sharp linear point: Control-click a keyframe point in the canvas, then choose Linear from the shortcut menu.
The tangent handles of the keyframe point disappear, leaving a sharply angled linear keyframe. To quickly convert the keyframe point back to a curved Bezier point with tangent handles, Command-drag the keyframe.
Convert a sharp linear keyframe point to a smooth Bezier point: Control-click the keyframe point and choose Smooth from the shortcut menu.
Tangent handles appear on the Smooth keyframe point, and the animation path becomes curved. To quickly convert a curved Bezier point back to a sharply angled linear point, Command-click the keyframe.
Note: The Very Smooth option is not available for animation paths and remains dimmed in the shortcut menu.
For more information on manipulating Bezier points, see Intro to complex shapes and masks in Motion.