Why would My F2 key not be working in Excel 2007. Each time I hit the F2 key it just does nothing. I'm so used to typing F2 and then the text to append to the cell, but it just overwrites because F2 won't open the cell for editing. I have tried with both "Allow Editing in Cells" option turned on and off and it makes no difference. I am sure it's just a simple setting but I'm not sure what it is does anyone know.