excel 2007 edit chart titles
 

I just upgraded from Excel 2003 to 2007. I am having a problem editing chart
titles in Excel 2007. When I try to edit, by highlighting the section to be
changed (in this case a model number or year). It only lets me change one
character at a time. And to complicate things, it then returns only the new
character typed -- and an "undo" brings me back to this onew character change
at a time.

This has the look of something that needs only a minor setting adjustment,
but I have not been able to figure it out. Any help would be appreciated.