Correcting mistakes

If you change your mind or make a mistake, undo your work. You can undo previous actions using the Undo, History, or Revert commands. You can undo only those actions that alter the project; for example, you can undo an edit, but you cannot undo scrolling a window. You can sequentially undo as many as 99 of the most recent changes made to the project in any After Effects window, depending on how many undo levels are set in Preferences; the default is 20. Specifying more levels increases memory requirements but does not affect performance.

Note: The Vector Paint effect (Pro only) can perform only one level of undo, regardless of the number of levels you set.

You can also discard changes by reverting to the last saved version of the project. Note that when you revert to the last saved version, all editing and footage imported since you last saved are lost. You cannot undo this action.

To undo the last change:

Choose Edit > Undo.

To undo a recent change:

Choose Edit > History, and select the change you want to undo.

Note: Using the History command to undo an action reverses all actions back to that point in time. That is, any actions completed after the action you undo are lost.

To set the number of undo levels:

1. Choose Edit > Preferences > General (Windows) or After Effects > Preferences > General (Mac OS).
2. Specify a number for Levels of Undo, and then click OK.

To revert to the last saved version:

Choose File > Revert.