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When you click the Fit Visible Curves in Window button (shown below), Motion rescales
the graph vertically and horizontally so the curve is entirely visible.
When you click the Auto-Scale Vertically to Fit Curves button (shown below), Motion
rescales the graph vertically so the curve is entirely visible.
When you use either of these buttons, the values of your keyframes are not changed.
Take/Show Curve Snapshot: A button that, when clicked, shows the state of all curves
in the Keyframe Editor. With a snapshot turned on, the original unaltered curve is
represented by a lighter color—visible in the background behind the curves you are
adjusting—and can be used as a reference showing the curve's original values. As long
as you remain in the Keyframe Editor editing the current set of curves, the snapshot curve
remains available. Clicking this button again causes the current snapshot to disappear.
For more information about curve snapshots, see Curve Snapshots.
Snapping: A button that turns on snapping. Keyframes snap to markers, other keyframes,
and other snappable items.
Auto-Scale Vertically to Fit Curves button: A button (the magnifying glass in the
upper-right corner of the Keyframe Editor) that continuously stretches the graph vertically
to show all curves.
When Auto-Scale Vertically to Fit Curves is on, the vertical range of the graph increases
to accommodate the entire curve even as you change it. For example, if you drag a
keyframe up to increase its value, as you drag past the top of the window, the whole
graph is rescaled, rather than scrolled.
602 Chapter 12 Keyframes and Curves