In the Header at the top of a worksheet I have lost the white space which shows the active cell Location and to the right of this cell the space which shows th contents of the active cell. I've been using Excel many years and this has recently happened and I can't find a way to get them back.

I now have to double click on a cell and it's contents (formulas, etc) appear in the cell.
I'd like to get it back to the original format.