Classroom in a book

17
Select the third keyframe—the Auto Bezier circle icon—to activate it.
18
Drag the handle, and note that the circular keyframe icon immediately switches 
to an hourglass, because manually adjusting an Auto Bezier keyframe makes it a 
Continuous Bezier keyframe.
#
 Note:
By adding 
these smooth curves, 
the parameter values 
change over the course 
of the effect such 
that they sometimes 
might be greater than 
the highest keyframe 
parameter value or 
less than the lowest 
keyframe parameter 
you set.
#
 Note:
If you add 
another keyframe, it 
will have keyframe 
interpolation already 
applied to it. When you 
first add keyframes, you 
can grab their Value and 
Velocity graph handles 
and adjust the curves 
manually. Making any 
such adjustment will 
change the keyframe 
icon to the Bezier 
keyframe interpolation 
hourglass.

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ptg
178
LESSON 9
Adding Video Effects
One additional velocity/interpolation issue
When working with position-related parameters, the context menu for a keyframe 
will offer two types of interpolation options: Spatial Interpolation (related to loca-
tion) and Temporal Interpolation (related to time). You can make spatial adjust-
ments in the Program Monitor as well as the Effect Controls panel. You can make 
temporal adjustments on the clip in the Timeline and in the Effect Controls panel.
These motion-related topics are covered in Lesson 10.
Adding lighting effects
This exercise combines hands-on, step-by-step tasks with experimentation. The 
purpose is to introduce you to a couple more advanced lighting effects and to 
encourage you to explore further.