2017

3 In the Animation controls, click Expression.
The Expression field appears below the Channel Editor.
4 Modify the expression in the field and press Enter.
The modified expression appears in the table.
TIP When you are in the Expression field, you can press Up one or more times to retrieve its previous contents.
This can be useful if you want to correct an invalid expression that you recently entered.
To remove an expression:
1 Click Animation to display the Animation controls.
2 In the channel hierarchy or Info view, select the channel with the expression that you want to remove.
3 Click Rst Chn to remove the expression.
The channel is reset.
Linking Channels
You can create an expression by linking the behaviour of one channel to another using Copy and Link. You
can link different types of channels together. For example, make the scaling of a layer affect the rotation of
another layer, or blur a layer by linking it to the position of an axis. Any change that occurs in the position
of the axis is reflected dynamically in the layer blur.
To create an expression by linking one channel to another:
1 Click Animation to display the Animation controls.
2 From the Channel View box, select Info.
(a) Channel View box (b) Link button (c) Copy button
TIP Enable the Hierarchy View button
to better view the channel hierarchy.
1242 | Chapter 24 Animating Keyframes