When selected, the current Edit selection collapses into an insertion point after zoom toggling in. Zoom toggling back out reverts to the previous selection.
When selected, the Grid setting stored with Zoom toggle is recalled when zoom toggling in. When this option is deselected, the same (current) grid setting is used whether zoom toggling in or out.
When selected, zoom toggle automatically follows the current Edit selection. When disabled, changing the Edit selection has no affect on the currently toggled-in track.