Modify groups of keyframes
There are many ways you can modify keyframes to create simple or complex animations. In addition to modifying individual keyframes as described in the previous section, you can also modify keyframe groups, effect curves (the line segments between keyframes), or the entire set of keyframes for a given parameter, and you can make all of these changes with great precision.
Select and modify multiple keyframes
Shift-click more than one keyframe.
All intermediate keyframes are selected. You cannot select nonadjacent keyframes.
Drag a selection rectangle around the keyframes you want to select.
Note: In the Video Animation Editor or Audio Animation Editor you can select a range by dragging with the Select tool or the Range Selection tool. To select a range of keyframes displayed in the clip body (such as audio keyframes) you must use the Range Selection tool.
To modify the selected keyframes, do any of the following:
To move the group to a different place in time: Drag any individual keyframe horizontally.
To change the value of all the keyframes: Drag any individual keyframe vertically.
Keyframe values remain relative to one another while dragging; however, if you “flatten” the curve by dragging all the way to the top or bottom of the graph, the keyframe values remain in that flattened state with all keyframes sharing the same value.
To increase the relative values by 1: Press Option–Up Arrow.
To decrease the relative values by 1: Press Option–Down Arrow.
To move both keyframes earlier in time by 1 frame: Press Comma (,).
To move both keyframes later in time by 1 frame: Press Period (.).
Tip: You can also modify any two keyframes simultaneously by selecting the line segment in between them, then performing any of the steps above.
Adjust all keyframes on a curve
In the Video Animation Editor, the Audio Animation Editor, or directly in the body of the clip (for audio level keyframes), hold down the Command and Option keys, and drag either a keyframe or a curve up or down.
All keyframes are adjusted by the same amount, preserving the original shape of the curve. However, if you “flatten” the curve by dragging all the way to the top or bottom of the graph, the keyframe values remain in that flattened state with all keyframes sharing the same value.
You can also copy specific keyframes between different attributes or between different clips. See Copy and paste keyframes.