The Transform Box

The Transform Box

The Transform Box lets you edit keyframe values in all
kinds of wacky ways. Toggle on Show Transform Box and
select more than one keyframe, and a white box with
vertices surrounds the selected frames. Drag the handle
at the right side left or right to change overall timing; the
keyframes remain proportionally arranged.
So, does the Transform Box help in this case? Well, it
could, if you needed to
. Scale the animation timing around a particular keyframe:
drag the anchor to that frame, then Ctrl-drag/
Cmd-drag.
. Reverse the animation: Ctrl-drag/Cmd-drag from one
edge of the box to the other (or for a straight reversal,
simply context-click and choose Keyframe Assistant >
Time-Reverse Keyframes).
. Add a decay to the animation so that the ball bounces
lower each time: Alt-drag (Option-drag) on the lower
right corner handle (Figure 2.8).
If you Ctrl+Alt-drag (Cmd+Option-drag) on a corner that
will taper values at one end, and if you Ctrl+Alt+ Shift-drag
(Cmd+Option+Shift-drag) on a corner, it will skew that
end of the box up or down. I don’t do this stuff much, but
with a lot of keyframes to scale proportionally, it’s a good
one to keep in your back pocket.