I'm new to excel and have to manage a large spread sheet.
1) How do I make the headers unchangable? That is, they should be read
only.
2) How do I restrict a cell to certain values? That is, I only want
"yes',"No", or "Don't Know"
I don't want spaces, or any other values entered....?
3) What is a good book for an Excel newby, but computer experienced...

Thank you