Converting expressions to keyframes

In some situations, it may be useful to convert an expression to keyframes. For example, if you want to freeze the values in an expression for a period of time, you can convert the expression to keyframes and then adjust the keyframes accordingly; if an expression takes a long time to evaluate, you can convert it to keyframes so that it renders faster. When you convert to keyframes, After Effects evaluates the expression, creating a keyframe at every frame, and then disables the expression.

To convert an expression to keyframes:

In the Timeline window, select the property in which the expression is written and choose Animation > Keyframe Assistant > Convert Expression to Keyframes.