User Guide

CHAPTER 1
46
Working with Projects, Windows, and Palettes
Correcting mistakes
If you change your mind or make a mistake, undo your work. You can undo only those
actions that alter the project; for example, you can undo an edit, but you cannot undo
scrolling a window. Specify the number of levels that can be undone. The default is 20.
Specifying more levels increases memory requirements but may not affect performance.
Note: The Vector Paint effect (PB 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 most recent change:
Choose Edit > Undo. You can sequentially undo as many as 99 of the most recent changes
made to the program in any After Effects window, depending on how many undo levels
are set in Preferences.
To set the number of undo levels:
1 Choose Edit > Preferences > General.
2 Specify a number for Levels of Undo, and then click OK.
To revert to the last saved version:
Choose File > Revert.
Selecting 16-bpc color depth (PB only)
After Effects can work in 16-bit-per-channel mode, making a larger range of colors
available. When you work with high-resolution images that use a narrow range of colors,
such as when you’re creating subtle gradients for film effects or HDTV output, transitions
between colors are smoother with less visible banding, and more detail is preserved.
UG.book Page 46 Wednesday, February 21, 2001 12:05 PM