191 Changing clip size and adding rotation Simply sliding a clip around only begins to exploit the possibilities of the Motion
effect. What makes the Motion effect so useful is the capability to shrink or expand
the clip and to spin it.
For example, you can start a clip full-screen (or zoom in even further) and then
shrink it to reveal another clip. You can spin a clip onto the screen by having it start
as a small dot and then spin it off the screen, having it grow as it moves away. You
can also layer multiple clips, creating several PIP effects.
Before you dive into this exercise, look at Motion’s six “keyframeable” options:
t Position : This is the screen location of the clip’s anchor point (its center unless
you change the anchor point).
t Scale (Scale Height, when Uniform Scale is deselected) : Scale refers to the
relative size of the clip. The slider has a range from 0 to 100 percent, but you can
set the numerical representation to increase the clip size to 600 percent of its
original size.
t Scale Width : You must deselect Uniform Scale to make Scale Width available.
Doing so lets you change the clip’s width and height independently.
t Rotation : You can input degrees or number of rotations, for example 450°
or 1 x 90. A positive number is clockwise, and a negative number is counter-
clockwise. The maximum number of rotations allowed in either direction is 90,
meaning you can apply up to 180 full rotations to a clip.
t Anchor Point : The Anchor Point setting is the center of the rotation, as opposed
to the center of the clip. You can set the clip to rotate around any point on the
screen, including one of the clip’s corners, or around a point outside the clip like
a ball at the end of a rope.
