Than you for taking time to look ss44..
I have resolved the issue.
There are two display modes......Author and User.
User gives that odd look........I knew I had to revert to Author mode, but could not find how to do that.....and where was hidden the appropriate buttons.
However now sorted .. the path is tools>preferences>advanced>content>style options>presentation modes
Thank goodness that is sorted.and thanks again for your interest.