Page size on startup automatically zoom to 100%

Hello All:  I'm new here and needed to ask this question.  Although I've been using CD for many years, I've never seen this and don't know how to change it.  When starting CD, I always have it open a new document, and (up until about a month ago) that new document always opened in the "Fit to Page" view.  Now, everything I open, whether new or existing always opens at full 100& view and nothing I do seems to change it.  I've searched every line of the options and have used the F8 key to restore defaults (Which does work, but only for the first document).  Minor, I know, but annoying, especially when I'm in a hurry.  Does anyone know how to cure this?  Many Thanks.