I have an existing excel spreadsheet, & I want to go back in, create another column, & automatically number it, starting at 1 & going on sequentially. According to the help, I started the numbering, 1,2,3 & used the FILL command (down). It then changes all the highlighted cells to 1!! I can number all the cells manually, but then I won't be able to go back in & insert any rows without messing up the numbers.