Hi Borate
Well, checking the Close gap in track option I did highlight all the tracks but only Tracks1 closed.
But--Yes..Delete (Ripple) after selecting a clip section shunts the tracks down OK. Hadn't used that option. Being used to film I tended to use just delete. 
I also noticed now, that there is an option when closing a gap of "Close gap in Sequence". This was greyed out in the earlier version. This option produced the same final result as Delete(ripple).
Selecting this after deleting a segment, all the following tracks (extra sound tracks and overlays) all moved down correctly.
Also..Yes! If I undock the preview pane by clicking the top right hand corner it can be enlarged to full screen. The playback is much better as well than in the previous larger preview screen.
Nat