I have a sheet I've been using for a while. I just added a column and set it up to auto number. All the rows increased sequentially, e.g. 1, 2, 3 etc. The child rows, and their child rows continued in orer, in otherwords the child of parent row #1 was #2. I'd like the child of Row #1, to be 1.1 or something like that. Be even cooler if te child of the child ( grand child?) would be numbered 1.1.1 or 1.1.a
How could I do that?