Reversing keyframes

You can reverse keyframes by dragging them past each other, or you can use the duration bar to reverse the position of all keyframes within the bar, for example, if you have an object that changes from red to blue as it travels from left to right. By reversing the color keyframes through dragging, the object now changes from blue to red, but still travels from left to right.

To reverse a keyframe:

Drag the keyframe past another keyframe in the Timeline window.

To reverse keyframes with the duration bar:

1. Alt-drag (Windows) or Option-drag (Mac OS) one end of the duration bar past the other. The cursor changes to a double-headed arrow and stopwatch  when it is over the end of the duration bar.

For example, assume the duration bar's start point is at 2 seconds and its end point is at 6 seconds (so that it is 4 seconds long). You can Alt-drag/Option-drag the start point to 10 seconds so that the keyframes are reversed, but the duration bar is still 4 seconds long. The duration bar is now in a new location in the timeline (starting at 6 seconds and ending at 10 seconds).

2. Drag the duration bar from the middle to move it to the time you want in the timeline.

Using the previous example, you would drag (not Alt-drag/Option-drag) the duration bar from the middle so that it again starts at 2 seconds and ends at 6 seconds, but with the keyframes now reversed.