Why can't I edit this Numbers spreadsheet?
I have a Numbers spreadsheet which I created on my Mac. My problem is that when I open it, it will not allow me to make any edits. I can see all the rows, columns, etc. including the content of each cell.... but I cannot select any of these cells.
All of the header items such as Function, Table, etc., are present but they are dimmed and I'm unable to select them.
I have other Numbers spreadsheets which allow me to edit just fine. My problem is with this one particular spreadsheet.
Is there some type of setting that I have unknowingly set whch has locked this particulare spreadsheet?
Any help is much appreciated.
Thank you.
Numbers 3.0.1
Mac 10.9.1