RotoPaint - Nuke 101: Professional Compositing and Visual Effects - page 256

3. Go to frame 4 in the Timebar and move the spline again to create another key-
frame.
4. Move the Timebar to see the shape animating between the three keyframes.
You can also animate other things for the shape, such as its overall feather.
5. Go to frame 1. In the Shape tab click the feather's Animation menu, and choose
Set Key ( FIGURE 6.17 ) .
Figure 6.17. Setting a keyframe for a Shape property.
The color of the Feather field changes to bright blue, indicating a keyframe.
6. Go to frame 11.
Thecolorofthenumericboxisnowlightbluetoindicatethereissomeanimation
associated with this property, but no keyframe at this frame.
7. Change the Feather property to 100.
The color of the box changes to a bright blue.
8. Go to frame 4 and change the Feather value to 70.
Using the Animation menu, you can add and delete keyframes. But you need
greater control overanimation. Sureyoucanaddkeyframes asyouhavebeendo-
ing, but what about the interpolation between these keyframes? What kind of in-
terpolation are you getting? And what about editing keyframes? You know how