You can change the timing of a clip without modifying the clip’s animation curves using time warps. Typically, you use time warps to reverse the animation in a clip, or to ease in or ease out of a clip’s animation. When you create a time warp for a clip, a time warp curve is added above the clip in its hierarchy and a green bar appears on the clip. You can manipulate the time warp curve to adjust how the time warp affects the animation in its clip.
To create a time warp for a clip
To edit a time warp
When working in the graph view with these tools, use the middle-mouse button.
To undo edits to the Time Warp curve:
While in the Graph Editor, click Ctrl-Z to undo the last change.
To restore the Time Warp curve to the original curve:
In the Time Editor, right-click and select Reset from the clip contextual menu.
To remove the Time Warp curve from the clip:
In the Time Editor, right-click and select Delete from the clip contextual menu.