Hi Trina,
I would suggest a macro to change Text constants.
If you mean the first character of each cell see the Proper_case
macro and it's supporting macro Proper_case_inner on my
Proper, and other Text changes -- Use of SpecialCells http://www.mvps.org/dmcritchie/excel/proper.htm
If you mean the first letter in the cell and next word after a period
Tushar Mehta has a macro see related area (links) at the above.