5

A selection box with eight handles appears in the graph area.
Selection box handle
After you draw a selection box, you can manipulate the box and keyframes in several
ways. Drag a handle of the selection box to move the keyframes.
Important: When transforming keyframes using the Transform Keyframes tool, by default
keyframes are adjusted in whole-frame increments. You can adjust keyframe in sub-frame
increments if the “Allow sub-frame keyframing” checkbox is turned on in the Time pane
of Motion Preferences. Sub-frame adjustments allow greater precision, but use the
Next/Previous Keyframe controls (or keyboard shortcuts) to move the playhead to
keyframes that are between frames. If you move a sub-frame-adjusted keyframe using
the pointer, the frame snaps to the nearest whole frame.
Transforming Keyframes
Repositioning the handles of the selection box is similar to dragging the handles of a
bounding box of an object. The difference in this case is that the transforms done by
moving these handles affect the selection box and the enclosed keyframes. Moving the
selection box moves the selected keyframes in whatever direction you move. As a result,
you can affect where the keyframes are positioned in time or you can affect their
parameter values, or both at the same time. Scaling the selection box scales the
keyframes in the selection box, changing their timing and parameter values.
Experiment with the selection box to see how manipulation affects the enclosed
keyframes.
To move the selection box
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Drag inside the selection box to move the box and the enclosed keyframes.
616 Chapter 12 Keyframes and Curves