In v8.6 on Win10pro x64 I could use <Ctrl><Scroll> to center the play head on the time line. It would only take zooming in or out by one increment to center the play head on the time line. That was really helpful when needing to cut out a portion of audio that was extending a bit too far to the left or the right . . . or to get the closest possible zoom when cutting from the beginning of a botched statement to the beginning of it correctly stated. Just using the scroll bar at the bottom of the window lends it self to "over adjusting".