A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
You actually come to wrong Forum you need to go to the Excel Forum.
However since you’re here:
- Try selecting the entire sheet
- Select all and change the Font.
- See if the information reappears.
- If it works then Try to go back to that Font.
If that solves the Problem You need to Check your fonts with FontBook a Procedure called Font Weeding
Use either :
http://word.mvps.org/Mac/fontweeding.html
or
http://www.officeformachelp.com/office/font-management/
and if you have Mountain Lion (OSX.8.x).
Read the tips here:
http://www.phillipmjones.net/Font_Book.html
If none of this helps Trot on over the Excel Forum