Editing : Edit Modes and Tools : Zoom Toggle : Auto-Toggle When Changing Selection

Auto-Toggle When Changing Selection
When Zoom Toggle is enabled, selecting a different range of material, or selecting material on a different track affects Zoom Toggle as follows:
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Changing the selection length does not re-zoom the window, the current zoom level is maintained.
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Changing the selection to a different track sets the toggle-in state for track height and view. However, horizontal zoom remains unchanged. When moving the selection from a toggled in track, the toggled out track height and view are restored.
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Auto-Toggle does not work for Edit selections across multiple tracks that are Zoom-toggled to Fit to Window.